I have weak/angry hip flexor muscles
You're 7 weeks out. Your muscles are neither weak not angry, they are injured! Big difference!
Your exercises - my comments in
bold
10 repsx3
heel slides x5 every hour or so -
that's okay but NEVER cause yourself pain with this one Heel slides and how to do them
ride the bike for 5 minutes x2 -
do it once every other day
stretching at home because of my back and hip. They have flared in this recovery -
yes you recovery is making them flar4e because you are doing far too much
Standing leg extensions--3 directions (front, back, and outside direction) -
these are not really knee exercises and anyway, they are far too much
Standing marching in place (hip flexor again) -
marching is a terrible exercise to you and very punishing
Heel slides -
see above
Leg over the table bent and extend -
half leg raise - be careful with them
Climbing and descending stairs x5 -
again, be careful, these can cause a lot of muscle pain
Stair stretches -
same as before, very punishing exercise
Stretching...nothing prone. These are 3 times for 1 minute hold. -
okay
Hip flexor--I lie with my backside almost off the table and stretch the hip flexor -
no, no! This is an awful exercise to do - will cause you muscle pain
Hamstring and calf stretches are assisted since those muscles (specifically hamstring is tight). -
okay
Assisted knee bend--no force at this point, just support thigh while knee bends with gravity.-
okay but don't let it hurt you at all
Bike 10 minutes
okay
So all in all, much of your pain is being caused by the exercising you are doing. I kid you not.
It's a great myth that you 'must' do all this to achieve a good outcome when in fact the exercises themselves will inhibit your recovery and cause the very situation they are purported to prevent. Read this
PT: the seriously grave consequences of doing too much of it