could I be pregnant

Suzanne
I've had unprotected sex with my boyfriend of two years and I haven't gotten pregnant so far but for the past few weeks I've had cramps but not like period cramps or poop cramps. I've also had some weird kind of sharp sore ish pain in my breasts. Also I've had some back pain but that could be anything. I've been nauseous a lot and I've thrown up in my mouth several times throughout the past few weeks but it wasn't really throwing up it was just a really small amount each time but I haven't actually thrown up since I was really young. Currently I'm supposed to get my period next weekend but I've been having these symptoms for a few weeks. I'm waiting to see if I miss my period before I take a test but I just wanted to know some opinions on if I might be pregnant or not.