Sometimes my uterus is tender. But I think it's got a lot to do with the growing and stretching. It comes and goes for me and has been off and on since about 10 weeks. I'm 16 now. I bought a pregnancy band that allows you to keep your pants unbuttoned. I couldn't handle buttoning my pants after about week 12. They sell them at motherhood maternity. I paid about 16$ for it. Totally worth it! The extra support also seemed to relieve pain in my abdomin that I didn't even know I was having.
Wearing clothes that are too tight can cause u to miscarry I'm almost 12 wks and I barley wear jeans but if I do I don't button them , I roll them down so they aren't anywhere near my stomach. Sweatpants have become my new bff lol