Yeah I think I'm fucking up my form, because I had to cut my leg day short, as my lower back was hurting like hell.It happens. Don't worry about it. You'll likely be fine next time
Fixed some of my issues on my squat, so my back wasn't hurting nearly as much as it usually does, but after hip thrusts, I was basically done. Tried to do a couple more machines but just couldn't do them and went home.