Little bump starting to form

R

Little bump is just starting to make an appearance when I lay down. It’s hard to capture in a pic, but there’s a definite hard lump in my lower belly. Normally my belly is flat when I’m laying down. Weird thing is that it comes and goes like my uterus is still moving around. This is baby 2 at almost 13 weeks, and I don’t remember that happening last time.