BACK, Aunty_Jam! Yep, it happens! I did the same thing, gained all my weight back and then some! But what's done is done and I'm taking it back off again and so can you!
I'm very sorry that you are dealing with your work, emotional, and back issues, but what I like about what you have to say about it is the silver lining. Your DH and you have lost your jobs, but you have a solid home and love for each other. You have bipolar, but you are capable of getting it under such control that your dr. thought about taking you off a med. That means you can reach that point again! You have a bad back and severe pain, but you have health insurance and an MRI scheduled (even if it is a wait.) You keep pointing out the good even under difficult circumstances. That tells me you may have fallen off the weight loss horse, but you are the type to get back on and make positive things happen! You can do it!

Good luck!