hi buddy ,i had the same problem on my very 1st injection ,1ml of human grade sust into the glue but i had someone do my injection for me and they hit the middle of my ass not the outer upper ,the next day the lower of my spine was very very sore and i was worried to say the least but i waited and it got better after 3-4 days ,there was no swelling like you say you have,as for your gear being pain free thats just not true mate a 1st time steroid injection WILL HURT for 99% of people ,as for the brand you have i know it very well and there have been counterfits in the last few months of that ugl ,am sure its just a bad painfull injection,your brand of gear and it being pain free is not true mate .