Danny,
you are going through the classic stages of grief. You are grieving your old life as you knew it.

There are 5 stages in the grieving process and they don't always go in order and sometimes they occur simultaneously. They are: Denial, Bargaining, Rage & Anger, Depression and finally Acceptance.

You're already taking meds so at this point someone to talk to (like a psychologist) may help.

There's a great little book called "Death - The Final Stage of Growth" by Elisabeth Kubler-Ross, explains it very well on page 10. Don't let the title mislead you - it's really a book about life.

I read it years ago when my father was dying and it really helped my outlook on life.