Also if you injected them in the same place. I am taking test E deca and EQ with D bol and winny... notice if I mix deca and test e then inject hurts for about 3-5 days so I just keep them apart and inject in different spots also I have had a few bad injections were I moved the needle inside me and that hurt for about a week and still feel it for 4 days after.... The pain could be from a lot of different things maybe the mix is too high in BA maybe it needs to be filter again pain from an injection could be from many different reasons but because its your first time it could be from that also... but I dont rememeber any injection on my first cycle hurting any longer then a few hours... and that was also deca and test e