Hey sweetie..
Just want to throw my bum in here and offer a few words. We started off at similar start weights (27 Stone 2lb) although my journey started back in January 2016... Jeez, that's a long 19/20 months lol!
When I first started group I had to get there via taxi or mobility scooter depending on pain levels. I have degenerative disc disease not related to my weight but due to past sailing career. Listing boats as a bubba thinking I was he woman or something. Along with horrific hip pain, they like to dislocate on me if I over do it. I was so glad I joined in winter and was able to park my scooter up outside and drive away as fast as humanly possible when group was over. I am now, however, walking the 1 mile to group and back... it takes me a fair amount of time still but I do move.Eventually.
Try not to give up hope, having so much to lose is freaking scary. I am very much in that boat with you, I refuse to look forward to target as it seems so far away I have always broken it down into half a stone blocks. 7lb seems a lot easier to aim for than 7/8/9/10 stone. Once I get there, I'm only a few lb away from the next aim.
I'm not one to pretend it's all rose petals and buttercups I have spent the last 8 months playing with the same 7lb because I've been messing around...(Practising for target) If you really want to do this you will. I would also suggest going with the Extra easy plan rather than green and red. It's far more balanced and more up to date research has gone into making it a really great plan to follow.
Stick to one A and one B choice... I don't wish to confuse you with other terms so honestly stick to one of each for a while and see how you fare. Remember to drink lots of water, not only will it force you to get up and go to the loo every 5 minutes but it will help flush your body and push for an extra loss. Bare with it, don't let a gain throw you off course else you'll just be back to square one xx