I got stung by a bee yesterday on my foot, and its swelling more and im pregnant im 28 week, what can I do to reduce the swellin?

Benedryl. Benedryl is OK to take during pregnancy. Also ice and elevation may help. If it becomes severe you can go to a doctor and get a prescription for prednisone - that is a class C in pregnancy but generally has no problems with the short term doses.