We need to split these problems into manageble sections.
Have U thought to contact CRUSE - support by the bereaved for the bereaved.  Most areas have a support group to contact.  It often depends on how the relationship with our parents /siblings has been as to how we deal with death.  I am usually fine until months later, when something totally unrelated will set me off.
MIND Charity helped me a lot via e-mail when a friend ended his Life.  Although they have a walk-in meeting every week I was unable to attend as in deep shock.
What support does your husband access?  Does the support ease his situation?
GPs won't prescribe testosterone.  Usually women have to go to a dedicated menopause clinic either NHS or privately - even though women would be getting testosterone along with other HRT regimes.  It is not simply a male hormone which many seem to believe!
When first depressed I wanted to tackle the cause, I kept being told that I was 'pre-disposed' as both sides of my family have suffered.  But I wanted to know why.  I have organic and clinical depression which is eased by Escitalopram 5mg at breakfast, 10mg at night.  The brain tends to get forgotten: out of sight out of mind  

.  Literally.  Also, 8-12 months of an AD might well help you see the wood for the trees.  I swallow my treatment without thinking about it.
Non of the ADs have affected my libedo.  The latter is due to hormonal upheavals.  I know because the night B4 a bleed began, I would sob for hours.  Even when a period wasn't due!
Don't beat yourself up for deciding to try a treatment regime.  If it works you will benefit!