Hello my partner went down on me and his whiskers hurt and i have been itchy and it stings sometimes and one side is swollen it has been about a week.

Have an exam: You should be examined by a gynecologist. This is most likely a kind of contact dermatitis, where irritation from his beard (or from any products, after-shave, etc) have irritated the delicate skin of the vulva. This could likely be treated by topical Benadryl or a topical steroid, however it is advisable to see a doctor to confirm the diagnosis.