Hi, I Had Sex 2 Days Ago And Me And

Hi, I had sex 2 days ago and me and my partner went from using no condom and then using a condom after but we did it a few times. I feel nauseous and have vomited. I'm afraid I might be pregnant but im not 100% sure. This happened ast time when the condom split and the next day i took the pill but i was sure and 100% then. I don't feel confident now.