Did I damage my wheel bearing(s)?, or WTH is going on??? Options

[conus00]

Couple days ago I came very close to having accident. Some jerk pulled a U-turn right in front of me and I ended up hammering my brakes so hard that I locked all four wheels and after maybe 30ft of skidding I stopped couple feet from that a$$hole. I was literally in a cloud of smoke from my tires so thick that I couldn't see anything behind me. Normally, I assume, that wheel/suspension components should be able to handle that amount of force with stock brake system but I have recently upgraded fronts to Willwood big brake kit and rear to GT disks. I haven't changed hubs or anything. Also, bear in mind, that majority of the components (not counting engine) are, most likely, original and hitting 230,000 miles mark.
That being said after this close call my car developed weird vibrations in front.
To best describe it:
It is not noticeable up until approx 65mph. After I hit that speed the cars has sort of bumpy feeling (like going over a whole bunch of tiny speed bumps). When I get close to 80mph the feeling of vibrations changes to, sort of almost a buzz.
Also I noticed that at the high speeds on highway (around 70-80mph) while turning into long curve (or changing lanes) the vibrations intensify. It's really hard to describe it.

I'm curious what might be causing this and how dangerous it is to drive in such condition. Also I'd like to know if it is in any way related to my near accident experience.

Thanks!

[Hanyo]

i vote flat spot on tire.

The only reason is because the speed at which the noise begins creeping up.

Locking up your brakes will take a longer distance to stop. With bigger brakes you need to learn to master threshold braking.