The silver filling in my tooth is very painful, what can I do to alleviate the pain?

See dentist. There can be many reasons for a silver filling to hurt. It can range from hitting high on the filling(bite off) to pulp (nerve and other live parts inside tooth) damage that can lead to an infection(abcess). Simple to worse case. See your dentist now.
Painful tooth. You may need a root canal treatment so check with your dentist.