birth control

okay guys first tjme posting on here...

so ive taken a bunch of pregnancy tests just to be sure. they are all negative but I'm starting to have a "baby bump" is what I'm calling it ive been losing weight and now all of a sudden I can see a bump on my stomach I cant eat some stuff that I used to like eating it just makes me sick now. all the trsts say I'm not pregnant but my past 2 periods have been weird. the alst ome was almost a week late and this period was about 3 days and just really weird I barely bled or anything for 4 days and now I'm just confused and I'm not sure what it is. but even my friends are telling me it looks like I have a bump going on and I just need some advice on what to do