I fell on my knee a few weeks ago and sprained it, now knee clicks/grinds is this going to continue?

Depends. Minor injuries usually evolve in a few weeks. If symptoms persist there may be more injury like a cartilage tear. An orthopedic surgeon can help make the diagnosis.
Agreed. Try rice to decrease your symptoms. If your symptoms persist, you may need to see an orthopedist for an x-ray and possibly a steroid injection.