Hello, Recently I Had Unprotected Sex And Don't Know Whether

Hello, recently I had unprotected sex and don't know whether or not I'm pregnant. I have irregular periods which come incredibly heavy so I can't miss it. I have been bloated and been having the urge to pee a lot. a friend of mine had told me that I possibly have a UTI since there's a burning sensation or a yeast infection. Not to forget I'm having some milky white discharge frequently.