Could I be pregnant?!

Tisha
I recently miscarriaged last month on the 7th at 4months. I was/am completely crushed. But I instantly knew that I wanted to try again as soon as possible. I bleed for about 2weeks after. 3 weeks after my miscarriage I had unprotected sex with my significant other. That has been almost 2weeks now. Starting yesterday I began to feel hot, headache, and nausea without actually throwing up. And those feelings are continuing today. I don't know if my mind is playing tricks on me or is this is a sign of a early pregnancy. What do you guys think?