It's alright, how much thermal paste did you use? And what brand?
I used a pea sized dot then spread it(I didn't know what technique to use dot or spread).Also when I put the heatsink on I had trouble with the mounting brackets so I had to take it back off for a sec then I just put it back on the paste I had already spread. Could that have messed it up? I used the paste that came with the hyper 212 evo.