odd... double check that there are no cracks in the frame and that the carbon fork has not come unbonded. Pull on the wheels and see if there is any movement at any joints.
Did the squirlley feeling begin around the same time as your brake lever adjustment?

Also check if the fork is bent at all... I bent a mtb fork once - bent it straight out so it increased the rake by 2" or so - and damn that bike was hard to ride.

How old are you? Are you in good health? Blood pressure? Do you have a family history of stroke?

Just covering all the bases