@funkymuse - Don't go overboard with the exercises! Just a very little is more than enough.
Remember, it's not exercising that gets you your ROM - it's time. Time to recover, time for swelling and pain to settle, and time to heal. Your ROM is there right from the start, just waiting for all that to happen, so it can show itself.
Let your knee take its time. The haematoma has given it a little knock-back, so it may need a bit longer than you'd hoped for.
I've probably told you this before, but there's no need to rush to get ROM (Range of Motion) 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
Also, consider this advice:
TKR: work “smarter” and not “harder”
Knee recovery - Lose the Work Ethic!!
TKRs and our fast food society
Life in the slow lane
Where are you in recovery?? (TKR)