Help identifying problem with bike crankset/bottom bracket A few days ago I took a fall going down hill after hitting a large pothole. I fell on my right side, which if you didn't know is the side that contains the chain and gears on most bikes. Looking at my bike today, I noticed that when spinning the pedal the chain on the crankset makes contact with the shifter at a certain point in the rotation in both 3rd and second gear. furthermore when running the pedals in reverse the chain seems to slip at a certain spot. 

So here's the question. I am having trouble identify the problem with my bike, I originally believed that it may be a bent crankset but due to the problem affecting multiple gears on my bike I am not sure that that is the case. The only other possible cause of the problem in my mind is a bent bottom bracket or frame and am hoping that you guys could walk me through identifying the problem and repairing it if possible.
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.