Got a brake job 3 months ago. Now its doing the same thing I took it in there for. Help me out

So you take it back and have them look at it

And exactly what is happening again?

Possible that some other part was bad and caused the new pads to go bad. Do you have very poor driving habits that can cause this to happen.

Was anything done to the rotors when the pads where changed ( assuming you had pads replaced)