High speed shaking

I'm going to start with the beginning because there
has been three types of shaking I've had with every
different fix. When I first bought my car there was a
slight shake at highway speeds. Nothing terrible but
nerving. I drove it with the shake from Grand Rapids
Michigan to Minneapolis Minnesota and back. I'm
sure it was my tires/ rotors because they were quite
close to bald. I get new tires brakes a rotors within
the week and all normal steering problems fixed
and shaking at low speeds gone. Driving this on the
freeway there was a slightest shake from what I
remember. Not 100% sure. I take my car in to get
inspected for Lyft and Uber and I had a leaking CV
boot. Also according to Bell Tire I needed new tie
rods(sp?). I took it to another mechanic and he said
no just the boots. I had those changed and let my
car sit at home for 7 days till I could get in for a
alignment. After that I take it straight to the freeway
and again, slight shaking. It feels like it's the front
drivers side, it also may be because that's were I
sit. And today I think it is slightly worsen. I feel it at
45mpr, nothing serious. And from 68-73 it pretty
noticeable. 74-78 it's less aggressive but faster. 79+
it's uncomfortable. My manager says it might be a
ball joint but neither mechanic shop noticed that.
Could it be the ti rod that bell tire was talking
about? Hep would be greatly appreciated!