Yellow,
Too much, too soon?
Overtraining is sooooo easy to do. Sounds like maybe that's where you are. A little too much stress on the knees and now they are letting you know. ouch! Might be best to back off a bit, ride shorter rides, with easier gears and spin, spin, spin. Try and have as little pressure on your knees as you can and still keep moving. Sounds boring and slow, I know. But it's better than starting out the season hurting and maybe risking a worse injury. Of course, that's coming from one who's recently joined the 50 + club (years old, that is) and I know it takes longer to recover than it did 20 years ago.
Good luck! Hope it gets better before it gets worse.
annie
Time is a companion that goes with us on a journey. It reminds us to cherish each moment, because it will never come again. What we leave behind is not as important as how we have lived." Captain Jean Luc Picard