Car wobbles my car wobbles a little when I am going 20 mph or less and today it started wobbleing real bad when I went above 60 mph. Could it have to do with me changeing the front tires with the back tires?

Do you have cross members on top of the truck's luggage rack? Check them for wobble. Mine does the same thing, just one of the cross members is wobbling at higher speed as it acts like a wing in the wind.

Here's a long answer. It could be 100 things. But if your wobble is showing up at low speeds, look at the tread on the tires. Does it snake back and forth? If so you have a belt separation in the tire. If it's not a tire, you may have a suspension part that's bad. Or, more than one. Control arms, ball joints, tie rods, (inner and outer), bushings, and wheel bearings, and any one of them could be waiting to send you into the ditch, or worse. Many garages will give you a free check of your major components. Try them. If you can't or won't, jack up your truck so one wheel is in the air, grab the front tire with one hand at 9 o'clock and the other at 3 o'clock. Wiggle the tire. A very little play, is probably ok, but if you have more than 1 inch of movement, you probably have a bad wheel bearing or a ball joint or control arm. Now grab the tire from top and bottom. Try to move the tire up or down. You should have NO play, at all. Any movement is bad, probably a ball joint, but it still could be a bearing. When you're driving, if your steering wheel is wobbling side to side, it's a front wheel problem. If you just feel the wobble in your seat, it's a rear wheel problem. Don't let the problem keep getting worse. If you put used tires on, it's probably a tire. That, you can fix. Anything else I've mentioned, you can't fix without some very expensive tools, and an alignment machine. Good luck.

A bent wheel, a lost wheelweight, loose lugnuts, front end misalignment or any of a dozen other serious problems. Take it to an alignment shop, NOW, before you do need a new tire.

check your cv joints, and axles this is assuming all your tires are round with no seperations

I think that is somewhat obvious
You stop using a vehicle that wobbles
at any speed just from a safety perspective
There has to be something worn or loose under
the front suspension & possible even the rear
If you never work on or have vehicle experience then
know the shops you have used for most of your life

tire rod ends if it gets to bad the tire will start shakeing and eating up tires

sounds like it time to have the front end balljoints inspected. Only with an inspection will you get the proper results. Why guess, this is a safety issue.

jack it up and spin the wheel ,could be rim or it could be a deformed /damaged tyre

Check the passenger side tire.

Have your van checked for alignment, camber and have those front tires balanced.