@dbjoyce
Oh, I'm so sorry to hear of your loss! It sounds as if your dad had a number of health issues. I would encourage you to take a look at the Grief and Loss support group on Connect. We have many members who post about their grief. I'm sure you will find a lot of support.
Here is a link to that group: https://connect.mayoclinic.org/group/loss-grief/

Do you have friends and family who can support you in your loss?