I need advice/help

I have PCOS and my period has been missing for months. I stopped taking birth to control because it was making things worse. Last week, I had sex for the first time in a while. He wore a condom but since it’s been a while, I have not felt the same. Afterwards, I was bleeding lightly for a few days. I’m terrified of getting pregnant, so I have been feeling kind of sick, nauseous and tired. I’m hoping it’s because I workout everyday, work a lot and have a hard time eating on time. I hope it’s just me overthinking but what do you guys think? I really appreciate it