I don't know what's going on

So I stopped bc in late June. I got my last period on August 7 and since then I have yet to start another period. I know that is normal. But lately everything is starting to make me super nauseous just laying down makes my nauseous. And I never get motion sickness but I'm starting to. Is this a side effect of me stopping bc? I don't know if it was possible for me to get pregnant since I didn't get any periods and I don't believe I ovulated.