Front end shaking on 1996 Buick LeSabre

I recently had my wheel bearing assemblies and my driver side outer tie rod end replaced and also had my wheels balanced. I drove from IL to TN with the car loaded down with boxes and my dog and cat and within the last 100 miles of my trip the front end started shaking really badly. It is still shaking really badly and it is worse at speeds of 50 or above. Could it be the tires came out of balance, I damaged a rim or maybe the other tie rod end is going out? Please advise. Thanks.

Asked by for the 1996 Buick LeSabre
Certainly safest to have it checked out. Look first for unusual tire wear or tire condition. An alignment shop or general repair shop should quickly be able to tell you whats wrong.