I got stung by a bee two days ago it's still swollen, red & itches how long will this last?

Meat tenderizer. Try using cold compresses on it for about 20-30 minutes several times a day. Iin between you might make a paste of meat tenderizer and apply it to the bite. The enzymes in the tenderizer rill help to extract the venom and reduce the swelling and itching.