Knee injury and rehab.......?

I had the meniscus of my right knee operated on in December and then I had the ACL of the same knee removed and replaced with a cadaver graft in February. I also tore the anterior tendon of the same knee but the doctor said it would heal by itself, I have been going to physical therapy and doing the stretches but my knee still wont straighten all the way and it is still really swollen. Now my doctor wants to do a third surgery to "fix" whatever is making my knee stay slightly bent and swell. My question is are there any ways to help the swelling go down besides ice and elevation? And are there any ways to get my knee to straighten???????