Right pedal problems

I just got my bike back from the shop (gear cable repair) before i took it in, when i was pushing down on the right pedal there seemed to be some clicking every now and again. I thought nothing of it, as i was cycling back yesterday the clicking started again and the right pedal felt as if it was trying to spin the pedal. As if something had got caught in the bearings and made it stick instead of it rotate in the same position as pedals do when your foot is on it. This happened a few times, i was wondering, is this the bearing knackered in the pedal? Or is it something else? Its the first time this has happened to me.
Bike - Scott Aspect 45
Roadie - Trek 1.5 2013
Roadie - Trek 1.5 2013
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Roadie - Trek 1.5 2013
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Roadie - Trek 1.5 2013