Look up anterior knee pain and prepare to be depressed.
It sounds like you have had an assement from a physio but not been back again?
If it is a tendinopathy,those who have already posted are correct and it can be months rather than weeks.
I had agrivation with my quads tendon at the end of 2017 when I took up Mountain biking again as a change from the road.
A year later I am back to cycling regularly after a combination of rest, Quad strengthening excersises, massage and Ultrasound treatment