Hello. I Had Anal Sex With My Boyfriend. He Did

Hello. I had anal sex with my boyfriend. He did not ejaculate in me and it was completely dry. The next day, almost after 24 hours, I got my period. Today it is the 16th, and i feel a little dizzy from the last 2 days. Even though I got my period right next day do I need to take the pregnancy test because I feel dizzy? Please help.