OK - one thing at a time. Question - can you do anything about the job now or is it worth staying put to get money for wedding then considering a change then? Why worry about a job and a wedding at the same time? Get the wedding done first - enjoy that then concentrate on something else.
Next - if last lot of AD's gave you sweats - tell the GP. Some people have to try a couple before they find the right one for them (I have had three different ones) - DO NOT try without them if they are making you feel down again and definatley DO NOT go cold turkey and just stop them.
The bills would turn up no matter if you had a wedding or not. Good that you are trying to earn more money. is there anything extra you can do? sell stuff at car boots or on ebay for example?
Don't worry about dinner - if it was so bad cook something else or ask someone else in the household to do it.
I make lists too - many people have to write things down - carry on doing that if it helps you organise and remember things.
Hope this has given you a few things to think about.
HUgs to you - I know exectly how you feel - in fact I think you are me 12 months ago!!