Is it possible that im pregnant?

hi, im 19 and im wondering if there is any possible way i could be pregnant. my boyfriend and i no longer use protection except for the pill, which i take on time. (i have skipped a few but this was a few months ago) Im exhausted almost all the time when i never was. but im not eating like crazy im actually eating less. i have major mood swings and i dont even realise it. Smells bother me that never used to. but i still have my period. I took 2 home test in the morning that were both negative. and im not gaining any weight ive actually lost about 5 lbs because for about two weeks straight I cant eat anything heavy. I still cant eat anything heavy or it comes back up. so ive mostly been eating crackers and toast stuff like that and its killing me when my boyfriend is sitting next to me eating a burger haha. so please help us out. Thanks Much !