Ok, I keep feeling like a fluttering in my lower stomach and I've been really gassy lately. I've taken a pregnancy test and it came back negative. If I was, I would have been about 16-17 weeks. I'm not sure what's going on. When I feel it, I'm not hungry or have any kind of upset stomach. Basically my stomach feels normal then the fluttering happens and then my stomach feels normal again. I'm not under any additional stress so I don't think it's stress related. Has anyone ever been through this and what was it?