Ok, I haven't been on here in awhile so I want to update my experience in case anyone is paying attention to this.
I switched to a different vial (same product same company...OP) and have had absolutely ZERO problems with pip. I am only pinning glutes because after that experience with pinning my quad ai don't think I will ever try that again. My whole upper thigh area down to and including my knee was swollen for a week and a half and extremely painful. It literally felt like my leg was broke.
So all indications would be that my problem was a bad vial/batch right? We'll check this out... My friend who is doing the same cycle I am , wanted to give my "bad" vial a try to see if he had same reaction ....nothing...he is using that vial with no probs.
I don't get it but I guess it don't matter now cause everything's going great. I can't pinpoint if it was my body just getting used to it or that batch was wrong for my body chemistry. All I know is. I went from extreme pip ...to none after I changed vials.