Player moves slowly by itself?

Hi, Just recently my character has started moving it (what seems to be) a random direction. It doesn't do it straight away, just when I start moving a bit. I have tried a few things such as seeing if it's colliding with a child object, but I couldn't see any colliders in the child objects.

I can't think of anything else it could be, I'm really stuck with this and it's such an annoying bug D:

Thanks, Anthony.