UPDATE:

Well its been a week since i started my rehab exercises and so far my hamstring and quads are gaining strength. I can now walk up and down stairs with minimal pain. My hamstring is still quite tight so i still walk without straightening my leg fully but it is improving.

I have a problem now where my calf muscle keeps pulling/cramping. This usually happens first thing in the morning after waking. As soon as i get out of bed and take a few steps i get a cramping pain right at the top of my calf where the knee bends. If i take weight off it the pain resides after a few minutes. As the day progresses and i walk further it dissapears but its still sore.

Any tips on what i can do to releive this?