Rose, can you try to get off the anti-depressants? When you are dealing with candida drugs are going to be hard on your immune system and liver. I take 5-htp, vitamin-d, and huge amounts of fish oil and it seems to be lessening my depression. Just something to think about.
Also, make sure you are eating enough. I know i feel alot worse if my calorie intake is anything below about 3000 a day. You need alot of nutrients from food in order to produce neurotransmitters such as serotonin and GABA.