1998 BMW 328 Car has a little shaking problem

Shakes or Wobbles problem
1998 BMW 328 6 cyl Two Wheel Drive Manual 2.8 miles

It might be a few problems but these are all the current problems.

When driving on normal roads while accelerating there is no problem but once I get to 3rd or 4th gear and I begin cruising the steering wheel begins to slightly shake
not so much that its ridiculous if I hold the wheel with both hands it wont shake at all, jsut a small side to side shake.

When on highway the shake is not there, however when I turn the wheel slightly to the left it kicks in vigorously but if I accelerate and turn the wheel harder left the shaking goes right away.

Also when breaking when I first push the break in it begins to shake, but if I downshift at the same time while im breaking there is no shaking.

P.S. My steering wheel is always a ltitle bit to the left never perfectly straight.