Alf, it's possible that your memory loss is due to your depression. Once you get that under control, your memory will get better. Although... some anti-depressants also cause some memory loss. From personal experience, though, I'd rather be on anti-depressants than being depressed! That's for sure!
Once your depression lifts, you'll care enough to take care of the other medical problems you have.
Hang in! It's a road you need to travel, but any movement forward is one heck of a lot better than being stuck where you are now.
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.