I have been doing stronglifts 5x5 and its my second week now. I have noticed some pain in my very low back. It is hard to describe where exactly. It is between the glutes and lower back but more towards the glutes. The image below will show u exactly where. I have drawn a red arrow pointing to exact point:

Now I do not know if its the squats/deadlifts or maybe just my everyday posture (I do have poor posture) when sittin down on a chair (i do sit down for long periods of time).
I am hoping its the posture from sitting on the chair but i have done this for so long so i dont think it would happen now (esp when i just started the routine). I only get the pain when I sit down or sometimes when i flex my glutes in a certain way. I dont experience the pain while I workout however.
Has anyone had this problem before?


