I'm 15w 1d and for the past couple weeks my uterus has felt pretty sore. It does not feel like cramping at all, nor is it painful. It's a dull achy sore feeling that I feel every time I get up from laying/sitting. Kinda feels like when your bladder gets way too full. And it's mostly on the left side alittle above my pubic bone. What could this be? Have any of you ladies experienced this?