jack each front wheel up one by one. leave the lug nuts tight. then push and pull the tire via the 3 and 9 o clock areas. there should be no movement. if its clunking i bet they move a good 1/4 inch.

you can change them yourself, but you'll need an alignment asap after you change them. do the pair aka both sides.

and make sure you have a grease gun to grease the new ones.