please help

hey guys I’m freaking out a little bit and having super bad anxiety about a week ago, my boyfriend finished near my vagina but i had underwear on. Since then, (srry if this is tmi) but I’ve had diarrhea my diet has been drastically different because it’s my spring break for school so I’m not at my college eating the foods I usually do. This morning I woke up super nauseous and I’ve had a cold for a while. I don’t know if I’m just sick, or if it’s just my body doing its thing since I’m eating differently, or if it’s because I’m supposed to start my period in 5 days, or because I’m pregnant. I really need help and I’m so scared. ???💗