I had bilateral TKRs this year-one in February and one in May. I did well after both of them. Within the last few weeks,I've gotten back to outdoor cycling, very light aerobic workouts (i chose the "senior citizen" tapes to be sure they were gentle), and resuming normal activities. For the last week, my first knee- the one that should be better, is in serious pain when I walk. I can ascend hills, do stairs both up and down, but walking on level pavement and descending hills is excruciating. It's worse than pre-surgery. I am seeing my doctor for X-rays tomorrow but am very scared that I screwed up somehow. I did have some dental work recently but took my antibiotics. Can someone please tell me that I just did too much too fast? My bike rides ARE long (12-22 miles each) but I felt no knee pain. I am so afraid of having to have surgery again, I could just cry. It was a lot to go through two TKRs within 3 months- the thought of going under the knife again is killing me. I was just getting my life back and now this….And words of wisdom?