 [ Symptoms ] i have small red bumps on my inner thigh and part of my butt cortisone cream and benzoyl peroxide did not work help [ Disease ] i would guess that vaginal dryness is the cause of your primary complaint the lack of estrogen a chief post menopausal culprit if your vaginal walls are dry the motion of intercourse can make the penis like sandpaper to your delicate tissues after sex the pinkish discharge could be your body is attempt to recover from the chaffing  also your vagina is more susceptible to overgrowth infection of naturally occurring organisms yeast gardnerella etc when it is dry i would see a doctor before attempting self treatment for any sort of vaginosis and she could prescribe or suggest treatment for the dryness good luck