Samsung Galaxy S II :: MTP + Voice Command Keeps Going On And Off?

I've had my phone since black friday, and just yesterday started having a strange problem with it. It was in my pocket and it vibrated once so I checked what it was and it said "MTP initialization" at the top and "Charging" at the bottom, which is what it does when I plug it into my computer or charge it. It seemed weird to me because it definitely wasn't plugged into anything at all, it was in my pocket. When I got home, I plugged it into the charger for about 2 hours.then when I unplugged it, it did the same thing, but it kept doing it. It'd look like I plugged it into my computer when I didn't, and then a few seconds later the "charging" and everything would go away and it would say "Running Media Scanner" which is what it says whenever I unplug it from the computer. Since that time yesterday, it has literally been doing this every few seconds, cycling between thinking it's plugged into a computer and then being unplugged.In addition, for a while yesterday, the Voice Command kept opening and closing on it's own, not sure why. It seems to have stopped doing that now, but it keeps doing the charging/media scanning thing. I can actually use it when it's doing this thing, it just keeps vibrating every few seconds which gets annoying, and slows the phone down a little bit. But when the voice command thing kept opening and closing every few seconds, it was almost unusable because every time I'd try to do something, it'd cut out and go to the voice command.