Hi IDM,
I'd be thinking that the depression is triggering the dreams, but I'd say that
any images in your head of attempting sui...........whether consciously
or "unconsciously" (in dreams) are worth talking about............
Of course it
may be "just a dream"/your brain processing things,
maybe even towards healing from those things,
depending on how you're feeling right now and how the dreams go........I honestly don't know.............
but it can be
too easy to dismiss things as not worth mentioning or irrelevant considering other things, or you can understandably feel uncomfortable about bringing things up..........although
those things, the things you aren't mentioning, can all add up alongside the rest to revealing the "
bigger picture", the
real picture of what's going on for you
, and
that's important 
That's
real important to you hopefully getting the right kind of help for you

But
ultimately............back to............
any images in your head of attempting sui...........whether consciously or "unconsciously" (in dreams) are worth talking about............
Alison