Right, now I don't know if I'm being paranoid or not, but hear me out.
I've started to notice that there's a vibrations through the accelerator pedal - its most noticeable in 6th gear between 2k and 3k (so doing about 50mph ish). Is it just down to low revs/high gear? I don't remember feeling it before at all though and my driving style hasn't changed.
Worth noting, but wheels do need balancing but thats only really noticeable at 70+.