When I Hit a bump and the jeep will shake uncontrollably on 2000 Jeep Wrangler

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Whenever I hit a bump the jump shakes so bad I have to pull over to gain control of the vehicle. It shimmy all over the road.
(1) Answer
mine does exactely the same and I had all wheels aligned back and front and back with front both sides. I spent close to 4.000usd trying to fix it. They changed front rear end still doing it. the only thing that could be is a crack the body of the Jeep. My boyfriend played with the alignement of the wheels and was able to stop the shake but it it very hard to drive , it looks like I am driving in snow.Got stoped by cops couple times because they say I am swerving in and out but no tkts given.