Pain in uterus 3 months pp c section

Hi guys. I had a c section 3 months ago. I got an infection in my uterus at 4 weeks postpartum and it was brutal. I finally got back to feeling like myself at 3 months and my dumb self decided to clean my garage. I picked up some really heavy stuff and now my uterus lower abdomen really killls. Its kinda hurting the way it hurt when I got the infection at 4 weeks. I'm not sure I was allowed to do heavy lifting. When can c section mommas lift things like usual? Agh I am so dumb