I would call a doctor (nurse's hotline or something) and ask if there is anything you can put on the wounds. My first thought is "Neosporin" but I am unsure if this is ok to put on the vagina. Also, if you call the nurse's hotline...you can just generally ask what they suggest to help in your situation. That way, you don't really have to look anyone in the eye and get embarrassed
In the mean time try to drink a lot of water. Drinking a lot of water will help reduce the concentration of your urine so that the area doesn't burn when you try to go to the bathroom.
As for wiping try some baby wipes that are non-alcohol and non-fragrance. That will help reduce the irritation of wiping as has occurred from using toilet paper.