After having intercourse in the shower I my vagina is dry and sometimes hurts to have intercourse even with lubrication why is this?

Yeast infection? Yeast infections occur when the area is subject to a warm moist environment. You can also get other sexually transmitted infections that might cause similar symptoms. You may have experienced some trauma to the area if decreased lubrication was a factor or an allergic reaction to the soap you used afterwards. You should see a doctor.