Something moving by my belly on?!?

I've been having this weird feeling in my stomach lately, for about 2 weeks or so. It's like there is something in there kicking? I started feeling that again yesterday and pulled up my shirt to look. I saw something pushing against both sides of my belly on. My son is 13 months old and it was just like when I was pregnant with him! I haven't had my period in almost 6 months but my gyno says its just because of my bc pills (yaz). I've also been sick to my stomach, nauseated and have had this 'mom' feeling (like I should be cleaning and am empowered, don't know how to explain it). During the first 3 months of not having my period 5 test were done and all were negative, just like the one I took 2 days ago. Has anyone had this? I'm really confused!