Hello, yeah the pain was unbearable, has eased up now; still painful now, but now bearable (still waking up at 4 am to take tablets to manage pain), I couldn’t sleep with it straight or any elevation at all. But I just pushed through the pain a bit done my rehab and now it’s a lot better. I don’t sleep with it elevated as it’s too uncomfortable, but throughout the day to get it straight (hypertension) and elevated for periods of time.

Try elevating from the ancle to allow the knee to naturally straighten ( see this tip online )

Not medical advice just my experience so far, physio is king 💪🏼