I had sex before my period came on in February but it was not my regular period it began heavy on day 1 but started to get into a light flow the next day. On that last day while it was going off I had sex with my boyfriend but pulled out. So after that day I started to have hot flashes, getting dizzy for no reason, feeling like I had to throw up and wanting to blank out. I was wondering is there anyway I could be pregnant or one of my eggs is getting fertilize?

Any time you have sex (protected or not) you risk pregnancy. Nothing is 100% effective and "pull out" is COMPLETELY unreliable.

Yes, you could be pregnant. Buy a HPT (ask your Pharmacist for a recommendation) and use it.

You wouldn't be "getting" pregnant. You either are or you are not.