problems during sex

Raven
So I have no problem getting wet during foreplay and whatnot. When I want to cum, I need clit stimulation so we usually get in doggy and I reach down and finish. But recently my clit area is never wet when I'm ready to finish and it really kills my mood. Like I want to cry sometimes. I'm not sure if this is a medical problem or something as simple as the friction just drying me up (but I've never had the problem before).... please help. Does anyone else experience this??