Uterus pain

Nicki
Hi! I'm 15weeks and 2 days today, and the past few days I've had lower back pain and pain mostly on the left side of my uterus. It's not extreme pain or anything or I would be at the er. It's just annoying/there. Is this the baby just making room?? And when will I actually 'feel' pregnant?? My belly has been showing for awhile.