Hello
@Mom_2_4 - and
Please will you tell us the full date of your knee replacement and which knee it is, so we can make a signature for you? Thank you.
You say you work in an ICU. Is RRT Renal Replacement Therapy or Rapid Relief Team? That's not an abbreviation we see much here.
Whichever, it probably means that you're on your feet for most of your shift. Right?
That's demanding rather a lot of a new knee, particularly as you went back to work a bit early. We usually recommend taking about 12 weeks off work, and then light or part-time duties for a while, even after 12 weeks.
Work is going to stress your new knee and probably make is more swollen, which will have an adverse effect on both flexion and extension. You know that your leg can straighten fully, because it did before. It will again.
If you can, when you get home from work try to do very little, except rest and elevate your leg. Ice may be helpful on your knee, but you may find that a warm pad or wheat bag my help more with your hamstrings and quads.
Don't go to PT - you're getting more than enough exercise at work.
The muscles and tendons at the back of your leg need to be stretched slowly and gently. You can't rush that. Let them calm down now, and don't go doing lots of exercises.
There's no need to rush to get Range of Motion, either flexion or extension, because it can continue to improve for a year, or even much longer, after a knee replacement. There isn't any deadline you have to meet:
Myth busting: the "window of opportunity" in TKR