Please help!!! No one is answering need it answered please

ey guys, so about 7-8 weeks ago I had sex for the first time ever, I've been on birth control since July (the pill) and took it everyday without failure. We also used a condom. I have had my period twice on the pill since we had sex, but recently have Put on a bit of weight maybe like 0.5-1 kg. I haven't had any morning sickness or any pregnancy related symptoms. But my lower belly has been sticking out just a little bit further than the rest of my belly. Could this just be bloating?