I am not sure if I am pregnant

Patient: I had my period on the 24 august and it normally last 5 days on the last day i had unprotected sex and i am not sure if he ejaculated inside of me. now 11 days later i get abdominal pain doesnt feel like eating and i get light headed when i smoke is it possible for me to be pregnant

Symptoms: Doesnt have appetite, light headed and abdominal pains