Lower left back pain after deadlifts?

[Raptor]

Hi,
I recently started with the Stronglifts 5X5 program, about a week old.I've been practicing martial arts for sometime and have decided to lift weights for some strength and muscle gains along with a need to strengthen my core.
Last evening, I did my round of Squats, Chinups, Overhead press, prone bridges and ended with deadlifts.I warmed up for 5 minutes before I started with my workout.
During the overhead press, I started developing the sore lower back which is natural since I my lower back is weak and this is why I have adopted this program.Now, during the deadlifts I think I had a bad form though I tried not to. I think my spine was a little rounded.OI think I also didn't unlock my knees as I came down with the weights.The soreness didn't increase much but I decided to stop after 3X5.
After I was done removing the weights from the rod, I tried to stand up but I felt a sort of a slip in my muscle at the left side of my lower back along with sharp pain in that 3 inch area.This was followed by tingling sensation throughout my left leg( thigh+calf)
I am not sure if I have pulled a muscle or it's a muscle strain or something but it hasn't subsided completely.This morning it seemed a little better but during the day with work, it's back.
I lifted 30KG(instead of 27.5) on the squats and overhead presses and 50KG(instead of 45) on the deadlifts.I know this is not strictly according to the program but I dont have the exact weights for it and I didn't have a problem lifting these weights at all during the 5x5s
The blue square is where I am feeling the pain.

http://img692.imageshack.us/img692/6281/backpain.jpg
The pain is dull but gives me sharp pains if I try to bend down or if I try to twist AND bend down to the right.Could any of you what's really going on?Is the Psoas that is getting affected? The pain is nowhere near my spine.It's just the chunk of mass which is giving me sharp pains but I have a bad feeling about this.
I apologize to be too descriptive and taking your precious time but I would really appreciate some insight on this.

[coreJack]

Nerve tingles down your leg and the description of the pain as sharp make me think it is a spinal injury. Check out McKenzie's Treat Your Own Back. If it is spinal, and assuming it was caused by hyperflexion (and not hyperextension) you need to avoid flexion until the sharp pain subsides, as this would not be the kind of injury you can work through.

[DeadStrength]

I agree with coreJack that it sounds spinal. I am not going to pretend to diagnose anything, but you have telltale symptoms of a spinal injury. Hopefully it's something else.

A huge problem I'm seeing is that you have low back pain from OHP. This is a telltale sign that you are adding unnecessary strain to your lumbar spine. This is because you likely are not locking your knees and flexing your glutes and you might also be leaning back excessively. If you are locking your knees, squeezing your glutes, have good intra-abdominal pressure, and don't lean back excessively, you should not have a bunch of lower back pain on the OHP.

Then you say that you had a (slightly?) rounded back while deadlifting.

My advice is 1) Go see a doctor and don't lift until you do (even picking up plates to load the bar for benching could be bad). I'd also be wary of martial arts until you see a doctor 2) Buy Starting Strength and in the meantime re-read the form articles on Stronglifts for all the lifts.

[coreJack]

A huge problem I'm seeing is that you have low back pain from OHP. This is a telltale sign that you are adding unnecessary strain to your lumbar spine. This is because you likely are not locking your knees and flexing your glutes and you might also be leaning back excessively. If you are locking your knees, squeezing your glutes, have good intra-abdominal pressure, and don't lean back excessively, you should not have a bunch of lower back pain on the OHP.

Raptor, if you injured it during OHP, it was probably from hyperextension, and perhaps there was some hyperflexion under load when doing deads. I agree with DeadStrength, you have to be careful not to further aggravate this injury. See a doc, but definitely pick up that book - he deals with both spinal flexion and extension injuries.

[Raptor]

Hey guys,
The sharp pain has stopped.The tingling in the leg has also stopped, thankfully. I did an Ice pack-Hot water bag process on the lower back last evening.Much relieved now.Even when I woke up, I didn't have much pain. But I still have a sore back. I think I will visit ans Ortho doc for a consultation.

Sorry to fire a noob question, but what is OHP?
CoreJack, I will take a look at McKenzie's treat your own back.
Thanks a tonn guys.

[DeadStrength]

Sorry to fire a noob question, but what is OHP?

OverHead Press

Glad you're feeling better but definitely see a doc. Hope everything's good man.