You may be allergic to the latex in that particular condom or to the lubricant used with the condom, or your vulva may have been irritated by vigorous penis-vagina sex without enough lubrication. Another possibility is you might have contracted an infection or STD. Please see your physician or go to your local Planned Parenthood clinic for a check-up (services are low-cost or free, depending on your financial situation). And good luck! Dr. J
I would say a latex reaction myself.
What kind of condom did you use? Have you used that kind before? Could this be an allergic reaction to the latex?