Op - I'm sorry that your having such a shit time. No one deserves to feel this way. 
Here's a way of thinking that changed my life:
Some, maybe most of your problems are down to your choices.
You are choosing to commute to work.
You are choosing to stay in your marriage.
You are choosing not to go to your Gp
You are choosing not to take medication.
You sound as though you may have lost some perspective on your life. You can pin all the blame for your current situation on your husband, or your GP, or and no one on here will encourage that.
I understand that you don't want to take medication. But with regards to your comment about the help you got with your post natal medication: 'all they did was offer pills and berate me for not taking them', well, what on earth did you expect them to do?
If you had diabetes, and refused to take the insulin that your doctor explained was needed, you wouldn't criticise the doctor for 'only offering medication', and then complain that you felt unwell as your. Mood sugars were high, and no one was helping.
I wonder why you are so against tablets. Some common reasons people are against them:
They are addictive - incorrect, they are not addictive
I'll be on them for life - the usual duration of treatment is 3-6 months
They'll turn me into a zombie - they act by increasing the level of serotonin in your brain. Serotonin helps you feel happy, and levels become unusually low in depression. Some antidepressants can have a sedating effect, some don't. Usually the ones that do are used for this reason, I.e. To aid sleep
The side effects are awful - the side effects are usually very mild (some nausea, restlessness) and disappear after a few weeks
Only weak people need antidepressants - people with depression need antidepressants. People with asthma need inhalers. People with Anaemia need iron....
Part of depression can be rigid and negative thinking. I know this is hard, but honestly, what do you have to loose by giving it a try? You sound miserable at the moment, maybe they'll really help. Think about that - they could transform your life. And if you tried them and they didn't work, well, then you know.
All the best.