Leg swelling after accident

Hi, I would appreciate any suggestions on my following situation:

In late January I had an accident with a power tool (grinder) and cut my knee from the inner side to a bit pass the center, right on the patella ( kneecap) and a second laceration high on my calf going diagonally. Both were deep lacerations, I had no fractures and the ortho told me that ligaments are fairly unharmed.

In late February the ortho told me to start putting weight and work on flexion of the knee. Flexing the knee past 90 degrees is fairly impossible, my knee still has a bulge, and the motion of the knee keeps making the healing really hard, especially on the side.

Sadly my appointment for Physical Therapy is for the end of march.

There are a couple of things I would to understand better:

In the beginning, the whole leg was swollen as expected. Over time the swelling went down, now more than a month after, the swelling comes back with movement. The more I move or put weight on the leg the more it swells. It literally rounds my ankle. When I sleep I elevate the leg and in the morning the swelling is gone.

I also get (every night) these brief cramps (muscle twitch) that travel from the injured knee down. They are not painful and happen in a blink of an eye.

Lastly, since the laceration is right on the knee and calf, they keep breaking the scab and the stitches are reaping into the skin.

The Ortho really scared me with the prospect of losing mobility in my knee. But I feel quite lost. Not sure how to balance the whole you need to move the leg and the healing.