Let myself go

It's been years since my last pregnancy and I'm confident that we are done. I have too many health problems to feel like I can carry another baby. My body isn't cooperating anyway. 
My issue is that I was put on a medicine to treat a mental disorder, this medicine had a side effect. I was aware and my doctor said she would monitor it. Long story short, she didn't and I ended up gaining 75 lbs in less than 8 months. 
Since then my GP had taken me off of it, put me on metformin, I'm now a diabetic! I am in constant pain with my back, I am not exaggerating when I say that it hurts to walk up and down stairs. I can work out for short periods of time but my gym has no air conditioning and its 94 degrees today, I feel like I would pass out. 
I'm having night sweats, I'm experiencing insomnia, depression but not nearly as bad as it was in the past. My biggest issue is that I feel like a heap of blob and I literally don't know where to begin. 
I don't shop because I can't walk that long. I rarely cook, husband does that too. 
I feel like I have lost myself and I'm no longer a person :( 
Can someone please share with me how you have bounced back from something like this. 
I'm not over reacting, I have been chubby, but I was 260, and it didn't bother me. I'm 340 now after losing 15 lbs when I went off the medicine. I can't even clean without hurting. 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors