I used to be afraid of public speaking and still am to a degree, but I was still able to teach classes to the military and after doing it a bit I eased up. Still was always nervous but just kept thinking if I was one of the students, I really wouldn't care that much about the teacher and jushit any crap over with. And also I know more than then on the subject. It's really all about relating to them. Once you zone in on that it becomes a lot easier.
I was always afraid of flying stinging insects, but my fears were truly amplified when at around age 10, at my mom's friends farm in Sumter County FL, a wasp landed and got stuck on my sock and strong me twice, and my mom freaked out, and not in a good way because I couldn't swallow the benadryl and she was embarrassed. Really a crappy moment. Stung twice and my mom was being an icehole cause I was embarrassing her. freaking wasps!