cam99, thats probably a yeast infection. you should see your gynecologist or get a home kit to help it go away.
On the other hand
I have had a staph infection on my left knee/thigh. A bump appeared a month and a half ago and I thought it to be just a spider or mosquito bite. I found myself not able to sleep at night and I would wake myself up crying due to the pain of the sheets rubbing against my skin. I went to the doctor and she didn't say it was staph, she said it was just an infection and I went on the antibiotic Bactrim.
Here, 3 weeks later after that one was scarring over, another bump pops up a little bit above it. I went to urgent care, she numbed it, drained it, and prescribed me to Bactrim again. I am now sitting miserably with flu like symptoms that have made me miserable due to this staph infection. They're serious, and can be deadly if it's MRSA, so if you think you have a similar case go to your doctor IMMEDIATELY to get on proper antibiotics.