Constant nausea

My husband and I are trying for a baby starting this month, but we haven’t been consistent. We had sex November 21st, 24th, and 28th because our schedules conflict sometimes.

Anyways, since Saturday I’ve been constantly nauseous. I don’t start my period for another 2 weeks. Is it possible to feel nausea if I were only 2 weeks pregnant?

I have no other explanation for the nausea. I’m not feeling sick any other way just very fatigued and nauseous for the last 5 days. I even got Covid tested just in case and I was negative.

Thank you