vaginal pain after sex every time

Hi,
Welcome to ehealthforum,
It is difficult to comment on the cause for the symptoms that you describe without examining you and going ahead with further investigations/evaluation. The chances of allergic reaction, infective causes, vaginal dryness, hormonal insufficiency etc cannot be ruled out. Consider visiting a gynecologist/obstetrician at the earliest for thorough evaluation to look for the underlying cause. Treatment as appropriate (based on the examination findings and investigation results) would be started to help you. If infective cause is detected, get your partner also treated simultaneously to prevent chances of re-infection. Drink plenty of water. Take adequate rest. Avoid vaginal douching, use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid use of tight fitting clothes.
Take care.