HELP !!!

So I woke up and I think I have what looks/feels like a yeast infection. I've never had it before but I looked up the symptoms and what causes it and my findings were accurate because the info said yeast infections can occur after you take loads of antibiotics and I just got done taking a antibiotics last week. Idk what to do and I can't go to the ER because I don't have transportation but I wanted to know has anyone ever had a yeast infection before and what would be a great over the counter medicine to use ??