Help identifying problem with bike crankset/bottom bracket
I would start by trying to align the front derailleur. If the problem persists, drop your chain and check the chain rings to ensure they are straight and no teeth are bent. With your chain off, you can also check your bottom bracket/cranks. Make sure there is no wiggle in your cranks towards and away form your frame. This could be a sign of a few things. If the wobble is only on one crank, make sure it is tight. If the wobble goes through from one crank to another (if you pull the top of one crank away from your frame and the other moves towards your frame) you have more than likely blown up your bottom bracket.