It is not unsual for some women to experience a reaction to the nylon in the hose. Make sure to wear cotton crptch pantihose, and better yet, try some thigh high.
Sme women find they do better if they do not wear panties and pantihose. Most doctors will tell you not to wear panties and pantihose as this keeps the vaginal ara to moist and open to yeast and other infections.
Go to the pharmacy and buy some over the counter Vagisil. See if that helps, if not that make an appointment with your GYN.
http://www.vagisil.com/