I had my tkr on May 8th. I can bend my knee fairly well, but I can't fully straighten it. My surgeon said that I only have 2 weeks from the date of surgery to straighten it, but my leg is so swollen and painful and tight, I don't know how to manage to do more than the simple pt exercises I have been doing since day one. Trying to straighten it, even on pain meds, is excruciating! Any advice?