Kindly do not use any analgesic cream over your nipple area or around since the skin is quite sensitive there.
Best would be if you consult a gynaecologist instead of google for your problem, since most of the times it is just a hormonal issue and nothing too serious as google claims.
Health Tips
Keep yourself hydrated and maintain dryness in that area. Keep changing your undergarments twice a day if you sweat profusely in this weather. It could also be a dermatological issue for your pinching sensation.