... weeks post-injection. I could not bear any weight and used a walker for several days. Lost a week's salary. Swelling resolved in 7 days but now the original knee cap pain is worse, causing night time awakening at least 2-3 times nightly. The joint also feels less stable. I don't seem to be responding to the prescribed Naprosyn and icing. Why was the reaction so delayed and is there anything I can do? 53 year old woman, no contraindicated meds, "pothole" in knee.