@tracy70: I know how you feel - the first 2-3 weeks after the surgery are rough. As others have said, keep icing the knee, and do the PT. Pain is different for each person, as is their tolerance. My pain was pretty intense, but after 3 previous (different) orthopedic surgeries requiring months of rehab I’ve learned to tolerate it better.
Don’t worry about being able to get your leg straightened out. Some people can do it within days, it took me almost 5 months to get the last, final, degree. I found that the bend/flex is more important for everyday purposes.