Dear Guest,

That all makes a lot of sense - when I was suffering from depression and anxiety a few years ago I kept getting suffocation dreams. Luckily, they seem to have almost gone away now.
To 'Guest-I'd rather not say' - professional help is the only way to go - although getting such help can be difficult.
One thing that you might try, in addition to the above, which can't do any harm, is eating more oily fish or taking fish oil supplements. These are rich in Omega-3 fatty acids - I have read that some authorities believe that these may be useful in treating depression and other disorders. Please remember, though, not to take this to extremes. My doctor told me that some people go mad and start taking handfuls of fish oil capsules - which can lead to other problems - not least of which is fishy breath! I take one Omega-3 rich fish oil capsule a day and I believe it helps, even if it is only a placebo effect!
First thing, though, is to talk to your doctor.