We were fooling around in clothes five months ago, a few days ago I threw up once and I couldn't eat for three days

good morning, I'm so scared and I'm asking for help. In 7th month me and my boyfriend were dry humping with clothes, I had 2 layers and he had the same. I'm scared of pregnany bc I'm 17 years old. We noticed wet spots on his pants and he told me it was from him, he was turned on but he told me he wasn't near ejaculation. I'm so scared, I don't remember if I was wet then. On September 8th I threw up once and I couldn't eat for 3 days. I was so sick, so from that moment I'm scared that I'm pregnant. 5 moths passed and my stomach is smaller, and I didn't had any simptoms since that one time that i threw up. my menstruations are not always on time, and that scares me, even if my menstruation lasts for 6 days.. HELP me please I'm so terrified