1998 JGCL Violent shaking-low speed

1998 Jeep Grand Cherokee LTD 5.9 ltr, 4x4 (all time), 170,126 miles.

This started about a month ago. I pulled out of my drive and began to accelerate when the steering wheel began to shimmy. I would say (well, after today's) it was moderate. It would shake for 15-30 seconds and stop. Occassionally, it would do it again throughout the day, but typically, it seemed primarily at first drive of the day.

Today, I left my house, made a right hand turn onto my road, it began again. This time, it was very violent. I thought for a moment she was actually going to go out of control. I pulled over, checked everything-no leaks or anything. I thought..well maybe it will be okay..I began to accelerate (never hit over 20 mph), and it began again. I pulled over onto the roadway again, turned LEFT to go back home (flipped a U Turn), and it wasn't doing it anymore.

I crawled under it when I got home. There is some rocks in my drive with what smells like brake or hydalic fluid of some kind (was pretty clear-slight color), about the size of a soda can. Front passenger tire is wore on the edges in an odd fashion compared to the rest.

Please help. I love my jeep but, I love my life more. I live in the foothills on a curvy, hilly road.

First pic is of passenger tire..second, drivers side and then one of the whole jeep (cuz I do love her)