left turn signal blinking fast but no bad bulbs

[mcurcio1989]

Okay here is a weird one. A couple weeks ago I plugged my dads trailer into the x5 and towed it around for a bit. At some point shortly after I noticed that my left turn signal was blinking fast. I assumed a bulb was bad but after getting out and checking they are all good. I checked any fuses that seem like they could be related thinking maybe one blew and is causing this. It seems like it can't be the relay as it is only on the left turn. Kinda perplexed and this is getting super annoying. Also this may be related - at the same time I noticed this I also noticed that the passenger mirror will no longer dip in reverse regardless of where the mirror switch is.