Could i be pregnant?

Patient: I am 25 yrs old. i have been nauseous for about two weeks now.i threw up one time last week in the morning. i can smell everything intensely. i feel like im tired and sick with a fever, but no fever. the last time i had unprotected sex was a little over a month ago. i also had a little bit of discharge for a couple of days about 2-3 weeks ago. i am on birth control and i have gotten my period after. could i be pregnant?