Pregnancy or signs of stopping birth control

Patient: I went off birth control about 6 months ago. I didn’t have my period for 3 months. I finally had it once. While I was off it I had protected sex. I haven’t had my period again since for 2 months. My stomach is abnormally bigger and bloated. I took an at home pregnancy test a week ago but it was negative. Is there any chance I am pregnant or are these normal symptoms from stopping birth control?