Am I pregnant?

I’m not trying to be, but I’m not on birth control and just use the “pull out” method...

I just got off my period not even a week ago, and it was a full blown, heavy period.

3 days ago I started feeling sick like nausea but never actually have to throw up, and if I eat too much at a time I feel “pukey” too. I also have mainly been feeling it at night time and I am exhausted getting home from work. Throughout the night I have heat sweats, wake up to pee more frequently, and get headaches through the night and in the early morning.

I had sex last week after my period... is this way too soon for pregnancy symptoms? Am I just coming down with a few days of a bug? Help!