Yeah I think mine ached a bit too. I just thought I was doing a crappy injection job or that the 5cc's in my glute was too much but I think it was the primo. Must be strong stuff!
You're injecting 5cc of Primo into your glute?
There is no emoticon that sufficiently registers the pain I imagine you having from that! The Primo I inject is 150mg/ml and for my first two injections I did 2cc in each quad. That nearly crippled me 24 hours later. When I stick a slightly smaller amount in each glute, I still get some considerable pain that lasts a few days.