Hi Paula, sorry to hear you are having more knee pain even after resting it. Having a UTI is stressful and tiring even if you don't realise it. I know from experience how stress often makes pain worse. I've had a similar thing, I did a few days of the exercise bike (only for very short time), and then helping get the bedroom ready for decorating, and have much more knee discomfort even after more than a week. I don't know whether that's why, or if it's something else, then the worry beads come out again. The more I try to do, the more I realise how limited I am yet. I'm a fine one to talk, but my hope would be that it's just a bump in the road and nothing to really worry about. Time will heal.
Tabby xxx