If you've got public torrents running and your collective upload speed is really low, you probably do have a problem. Try a couple things:
1. Restart uTorrent. Like, actually close it from the taskbar, not the x in the corner, and then start it up again.
2. Restart your computer.
3. Force encryption.
4. Reset your network - shut everything down and then bring everything back up.
Basically, try them in order until one works.