Is it possible to feel pregnancy symptoms 9 days after unprotected sex?

Aniya. • Mommy to a little boy & happily taken ❤️
It might be too early and I know sometimes people say when you think about it alot you actually make yourself start to feel the syptoms.. If that makes sense.. But lately I have not been feeling good at all.. Been extremely tired lately when I have been doing absolutely nothing and for the past 3 days I have been getting very bad headaches.. and I noticed that when I been getting these headaches my whole face gets very very hot, like it's on fire.. like I have a fever when I don't. There also one day where my boobs were feeling sore and that has never happened. The pain wasn't anything too bad just didn't feel right since it never happened. It only lasted an hour or so. Is it possible to feel syptoms this early? Just haven't been feeling like my normal self lately.