If not swolen at injection site [lump] and not red and warm to the touch, you should be fine bro...
Sustanon almost always hurts like a biatch first couple injects ,,, good news is after a few more injections
9 out of 10 times does not hurt as bad...
keep massaging site and next time warm up the Sustanon under some hot water b4 injection, and take a hot shower while massaging area right after..