What metmom said. Hire a professional for this situation. There are times when a professional is needed, and I don’t think you want to take a chance on anaphylaxis. It can happen before you know it. Nothing to play games with.
I never used to be allergic to bees or wasps, or any insects. Just every kind of pollen and mold.
A couple of years ago, I got stung by a couple of yellow jackets. Sounds like what you went through today. Within a couple of weeks, I got stung just one more time. That time I wasn’t so lucky. My arm swelled up the entire length of it. Red, hot, horribly painful. ER doctor gave me a cortisone shot, and antibiotics. It helped, but I’ve had to have an epipen ever since. I’m VERY CAREFUL around bees, wasps, and yellow jackets now.
That sounds like the kind of reaction I have.
It takes about a week to get over, and days 3-5 are the WORST.
Anaphylaxis can kill in MINUTES. There was an allergist in CNY who lost his life to it when he hit a ground bee nest mowing his lawn. They found him still in the backyard. And of all people, he’d have recognized what was happened in the few minutes he had.
I don’t want to install fear into anyone, but reasonable caution needs to be taken with some things. Some things are not worth tka\\aking the risk over.
So, I did further research. (Diana will laugh.)
It turns out all sorts of things will drive wood bees off, and maybe the easiest for me is loud bass sounds (vibrations). I'll have to hunt for them, but, somewhere I have a couple of these:
https://www.parts-express.com/Dayton-Audio-BST-1-High-Power-Pro-Tactile-Bass-Shaker-50-Watts-295-244?quantity=1
The beauty here is that I can "apply" one of these to the top of the wellhouse roof and hold it in place with a little rope and a couple bungee cords, also keeping a cheap blue tarp over the shaker to ward off rain.
If that doesn't work, I really CAN pipe in car exhaust from outside, without risking getting stung. And having pondered it a bit more, Dad had some insecticidal smoke bombs "somewhere", too...