Pregnant? Confused, sick?

Kj

I had a blood test done on the 13th which was CD21 and I had not yet ovulated . I only had sex on 11/19, and today I feel nauseous and I did vomit. I dont know when I ovulated but it was after the 13th and I only had unprotected sex on the 19th. Am I just getting sick because it's too soon for morning sickness right?