Having some anxiety issues, medical field related

First off, I'm 42 y/o, married father with 3 kids and I've been a paramedic for 14 years. I was an EMT basic for a few years before that and always worked on a really busy ambulance. I've gone into nursing school. As a paramedic I have always been confident and gross things have never bothered me, I've always felt I could remain calm on anything. I should start by saying I've never had a fear of needles on myself but occasionally have passed out when blood is being drawn from me, never had issues with shots or IVs on me.

Now, I had to have a tider(sp?) done on me for clinical rotations and I passed out having blood drawn. A few days later my nursing instructor tells us we will be sticking each other in class. As a medic I use to let people stick me all the time. For some reason I got bad anxiety about all this and asked her not to let me get stuck. She wouldn't have it and I of course had to lay down while people stuck IVs and IMs in me. I never passed out but ever since then I can't handle seeing blood and needles in people. I constantly feel dizzy, "jelly legged" chest pain, and tightness in stomach.

I've gotten to the point even doing a finger stick on people messes with me. My grades are great and I feel no pressure in the class or at home. I can now not even let someone take a BP on me w/o getting bad anxiety. It's turned into if I'm around a lot of people also I get anxiety. Went to my younger daughter's play at school and got dizzy standing up and had to sit down during prayer. When it was over I couldn't stand up to go to my kids, felt like I was stuck to my seat. I've never had anxiety before and have become terrified. I don't know how to approach a doctor about this and am of course now terrified to go to one. I've always been a calm and laid back guy. For the most part I handle sticking other people ok but can't watch nurses or doctors perform basic procedures, things that have never been an issue until recently. I do get slight anxiety if I'm doing an iv though, I mean, I've done thousands over the years, I don't understand. Any advice?

Tldr version- I have vaginitis