So the last two times I have injected into my right ventro gluteal I've noticed that it was a lot harder to push the plunger on the syringe and the test flow was a lot slower than normal, also when withdrawing the pin there is almost a vacuum effect and it is tough to pull the pin out of the muscle. Currently I am only injecting 1.5ml of test e twice a week. Ive injected up to 4ml before with no problems. Any ideas on what the problem could be, Id hate to take it off my rotation cause it in one of the most painless spots ive found that can hold a lot.