I've Never Been Pregnant. I'm A 25 Yr Old Female.

I've never been pregnant. I'm a 25 yr old female. 5 4" in height. I've gained about ten pounds this month, had a early period this month. Five days early. I typically have normal cycle patterns, 28 days. The period has stopped. But now I'm having abdominal cramps, and feeling nauseated and dizzy...could I be pregnant?