Hi there. Oral sex rarely leads to an std. I would guess that you have a yeast infection based on what you've written. Of course you can't be diagnosed over the internet--- and if you've never had one, it really is best to see a doctor to confirm. Now, at 14, this is what we have parents for. All girls can get yeast infections. Babies get yeast infections! Your mom can take you to the doctor and you'd get medicine or she may choose to get you some over the counter medicine that also works. But you really need to talk to her about it. It's nothing to be afraid of or ashamed of. good luck
Get a pap smear.. I hope you dont have a sTD