So I guess I'm allergic to dope now? (at least anything local to me)

This actually started a few years back, amidst the beginning of the fetty takeover in my area.

I've always gotten what I was told were histamine reactions from tar - itchy, red, swollen blotchy spots, usually near the injection site. Sometimes worse than others. After 10 years straight of this mildly annoying reaction/side effect, all the sudden I couldn't do tar at all w/out taking 3 Benadryl 30 mins before a shot, otherwise I was risking full-body "histamine reactions". Then my throat started closing up & the reactions started to resume something closer to onset anaphylaxis. This is part of why I made the switch to fet. No one around me has had a similar experience, tho. Recently I tried some of the "china" that's been going around near me. Everyone has been stoked on the shit. I hit a very small amount, just in case. Took Benadryl beforehand. To my dismay, on my arm where I hit, the vein swelled up so damn big it looked like a fuckin garden hose under my skin, running all the way up to my neck. Hurt like hell, too.

Idk what my point is exactly, I guess I'm just hoping to hear from someone else out there with a similar experience, or who knows wtf is going on here. I fucking hate fetty & I miss my dope, but from here it looks like I'm fucked.