Arggggh! I think I have a yeast infection or UTI

Okay so I had sex for the first time. I was an idiot and didn't read up in what to do after having sex. Now it burns when going pee and occasional discomfort and itchiness. It's been going on for a month now. The problem is, I can't get any doctor check it out. What can I do at home to help this pain go away forever?