Pregnant possibility?

I had unprotected sex on the 6th (i got off of my period 3 days earlier) i usually take my pill at lunch but I forgot and didnt take it until the next day. Wednesday the 16th i got a cold and started puking in the mornings until yesterday so I havent taken my birth control pill and I usually get my period if i dont take it but I havent got it. Im getting over the cold but im starting to feel nauseas everytime i move. I'm not sure if I caught a bug or if I'm pregnant.