hopefuly you only have a yeast infection due to not peeing or washin right after!!! Make sure you do that in the future! Another can be an STD ur doing right thing by going to OBGYN n being pregnant will not give you symptoms like that this early! Good luck
Sounds like a nasty yeast infection.
Any discharge at all?
I am assuming this was UNPROTECTED SEX?
You should post in the Sexual Health and STDs Forums.
If it's itching and burning you most likely have Bacterial vaginois... it's vaginal infection research it no it's not a std, but it isn't pleasant. Or you could have a yeast infection, idk why your period is late maybe you should take a test