Could I be pregnant?

I had sex last Sunday when starting Monday, a week later from that Sunday, I began to feel slight nausea, a lot of fatigue, cramps(period is not due for another week or so), and bloated. My CM has also been quite thick, creamy and white. I was not concerned at all until my friends confronted me and questionably asked why I have been eating so much, why I have been going pee so continuously and also that I have been overall different. Everyone thinks I could be pregnant. Should I consider that I could be?