Pregnancy symptoms

I work at a restaurant and yesterday I couldn't bare the smell of eggs without getting nauseous and now today as i wake up to eat breakfast i took one bite and one smell of wjat my mom cooked and got nauseous again now i took a pregnancy test about two weeks ago because I thought I could be but it was negative  im on the pill but sometimes im forgetful the reason i took the test was cause i went three packs without a period. Is it possible to be convincing myself im pregnant and get these symptoms or should i retest