I did squats yesterday and I was starting to step the weight up after having being out of the gym for over a year until 2 weeks ago. This was my 3rd time doing squats in this 2 week period since I started lifting again. On the last rep of my last set my form slipped a little bit and it turned into kinda a shitty goodmorning. I have a fairly strong back and I do deadlifts on the regular, and the soreness I'm feeling is similar to the day after deadlifts but more in my lower back than the middle of my back. Bad form?