Scared

Hi everyone. Okay so i am so nervous about being pregnant. My boyfriend and i have sex but we use a condom and i am on birth control. I am not amazing at taking it at the same time everyday, but i do take it. Lately I have been having stomach issues and it has been happening for about a month. Went to the doctors and they said nothing was wrong. There is no way I can be pregnant right? We use condoms each and every time we have sex. I feel so bloated and i guess that’s what’s scaring me. Also, after I eat a lot my stomach starts to get uncomfortable and painful. Any ideas what this could be?