Lower back pain after leg press

This happend about yesterday I was doing my leg press set I went for about 120 kilos this was the second set I went a little deeper than usual on last 1-2 reps right after the set i felt pain in my lower back, left side to be precise. The pain is not constant I only feel it while bending forward or to the right it's more of a stinging pain rather than an ache. I am able to walk normally and sit

Is this a disc issue or just muscle pain, and if I should be worried