As hard as this is for you to do, you probably need to do LESS. I go to therapy 2X a week, but I don't do any other exercises except some basic stretches and bends in the morning to loosen everything up before I get out of bed. I'm at nearly 10 weeks out, but that's what I've been doing almost the whole way. Everything is falling into place for me. I have been gradually increasing my daily activities as I gain stamina (very slow), but at 4 weeks, you still need to be focusing on resting and basic self-care tasks.
With all that work you're doing, you're aggravating your healing soft tissues, and they are still very angry at four weeks. They need rest, elevation, and icing to get swelling and inflammation down so it can bend. Until that happens, your knee won't bend. Please consider doing less for now.