Part of your issues may be due to dehydration, drink lots of fluids, preferably water, and as for the nose issue, there are a couple of possibilities, it could be seawater irritation from getting some saltwater into the sinus cavities, or it could be irritation from having to blow hard to equalize. Stay out of the water for a couple of weeks, and rehydrate yourself. If it still hurts in 2-3 days, call DAN