so im 4 weeks in and shots have gone smooth until this week. every time I shoot this week , my muscles wont take the gear...i penetrate, aspirate, and then go to shoot and the plunger wont move, not matter how hard you push and no matter what spot I shoot in...im very confused and need some help...think I just got a bad batch of pins or something, and the gear is getting stuck in it???? think its my muscles that dont want it???? what should I do?