I am trying to pull myself out of a similar spiral. I have three stress fractures in my foot and I really hurt myself and stopped exercising. Then I started slacking on the food....then the GUILT! Did it stop me? NOoooooo!
Today, I made myself do 20 minutes of pilates. Its not cardio but I was moving. It helped.
You've lost
70 pounds! That is incredible! You are going to get back on track. You just took the scenic route for a little while. Okay, been there done that. You are going to be fine! We are all here to make sure of it!