Drive a mile or two (no more) without pause at around 30mph (no faster), pull over, stop and if the alloy or steel of your rear wheels is getting warm to the touch - and particularly if they are warmer to touch than the fronts - it is likely your rear brakes are binding for some reason. If seem to be OK keep driving, with care, and feel them again a couple of miles later. (With friction things heat up and expand causing more tightness, friction, binding, heat... A vicious circle.)
Be careful not to burn your finger, though.
Better still, jack the car up with front wheels chocked and the car in first/low gear and see if each rear wheel spins freely by hand. Then do the above road test with care.