Is my gf possibly pregnant?

ok so ive been with my gf for almost 7 months now, and we have fairly often. we always use protection and recently one of her friends found out she was pregnant, and this has really spooked my gf. her period is due in about 2-4 days but she is complaining about dizziness, headaches, sickness, stomach cramps and that she feels hungry a lot even after she has just eaten. we did have once without using a condom, but it wasnt for very long as we stopped after a short period and put one on before i came. so im just wondering if its possible that she's pregnant judging from the symtomps ive described???