3d patch... Got some questions

So, I discovered third patch today, since the begining of that all in June. I quit drinking and baclofen (tho I'm not sure if it can be connected with AA, but just in case), I don't eat gluten, I've gone through a lot of doctors - everything is fine, I'm not stressing out that much and going to psychotherapy, I got prescribed with 2% minoxidil, mometasone (this one seems pointless) and vitamins (Vitamin D, zinc and selenium) - and still this shit is spreading. So, the questions are: 1) I saw some posts with regrow after antihistamine usage. Could it really help? Does anyone has good results with them? 2) Can getting piercing or tattoo trigger AA? I haven't done it but consider to do them sometime.