Am I Pregnant?

I had sex Saturday night and my boyfriend did not wear a condom. He DID NOT cum but I heard theres still PRECUM. Im on a high dosage of Birth Control. According to my BC, I start my period in 3-5 days. 
The symptoms I have is a feeling to throw-up but I dont throwup , sore throat ,and my stomach is growling alot. Sometimes I can feel my stomach vibrate? 
I also have a food allergy called Celiac, a small intestine disease, Its where you are allergic to foods and I havent been following my diet and Ive been eating the foods I cant eat recently. What does this sound like to you? Comment! ❤️