Super welcome to the famly here.
LOL..lots of really good questions too!
Most of us get immediate worsening of the swelling without our compression bandages and/or garments on. I sure do.
I have had several lymphoscintigraphy tests done. The first one done way back in the 60's (lymphangiogram back then) showed that I am missing significant inguinal lymph nodes. With me that has been made even worse as a number of years ago some of the only ones I had became malignant.
A more recent one showed the lymph system on the right chest side has basically shut down and has the thoracic duct.
We believe these two things happened as a response to chemo therapy I had.
BTW, the heavy foam underneath may be good to at least try just in case it might help.
Swimming is the absolute best exercise for lymphers. The gentle pressure of the water against the legs acts much like decongestive massage therapy and helps move a significant amount of fluid from the limbs. LOL...I tell my jock friends that I may not be able to catch them in a road race - but I'll wipe them out in a swimming competition
Keep up on the exercises too, not only will they help the LE (lymphedema), but they are great for over all body health too!
As away on the questions, that's why were here