This isn't medical advice....just one bee sting reactor's lessons learned the hard way.

Always remove the stinger. If the swelling is more than the size of a hand, see your doctor (you qualify). Warm compressess in the meantime can alleviate some of the discomfort.

The regimen for me is now oral benedryl once I'm stung and to the doctor for steriods if it swells to the hand-size.

When out, I carry an epi-pen with oral benedryl taped to it. It is an amazing weapon against the bees. I had one pace me momentarily on the bike and all I had to do was tell it, "I have an epi-pen and I know how to use it" and it flew off in the other direction. It is my magic saber