Should I go to the doctor ?

So last Friday I started my period then on Saturday I went to mall I completely forget to brings pads. Yes I know very very dumb I didn’t get home till 6:30pm from the mall. But as soon as I did I changed it the next day I would go to the restroom and it would burn. Then Monday came and it burnt so bad to use the restroom and in class I could feel the pain. It all sounds like a UTI right so I went to the nurse and she told me it all sounded like a UTI and to drink lots of water. So I did and the pain lessened and it doesn’t hurt almost at all When I use the restroom. There’s still slight burning but now there’s itching also so I don’t know what’s going on anymore. I’m also not sexually active at all so I don’t know if I should tell my dad to take me to a doctor. Or I should just go to Walmart and one of those over the counter creams for vaginal infection. Yes I understand that they’re used for yeast infection but at this point that’s what I think I have. What do you guys think I should do & what do you think it is ?