You can try using a toothpaste specifically designed for sensitive teeth. Rub a little toothpaste into the sensitive area when going to bed as it helps protect the surface.
Try to avoid strongly acidic foods and drinks and wait at least an hour after eating before brushing as this could cause even more sensitivity. Grinding your teeth can also increase sensitivity and a mouth guard maybe necessary.
If the pain continues, speak to your dental team and they may be able to offer further care to reduce your symptoms. A number of things can cause sensitivity and your dental team will be able to identify these and advise the correct care.