Hi Wendy.
I too was in your position a few years back, seven years ago...children youngest were ,14 and 15, eldest had left home. My husband now ex was a nightmare.
Situation I had a breakdown, ended up off work and in bed for five weeks...major MH issues...yes I started AD's and latter HRT...I was at a point of almost taking my life. How did I get through?? By taking back control..taking meds, access counseling and reminding my kids I was the adult in charge and not them! If they were unkind I told them how they hurt me or I just walked away to stop their power trip....I delegate tasks in the house or let stuff slip. I found my now ex was cheating.
Outcome...I left him now divorced. My eldest died 3 years ago...so sad, my middle one lives with me now 20 loves me to bits, my youngest has many issues.
So, look after you! Go steady be safe and one day at a time, if I can do it anyone can
Woodlands xx