First Day Back on Depression Meds

I’ve been taking clonazepam for almost a year now. Doctor said my grieve  and ptsd has turned into depression.  I was on depression medication ten years ago and ended up on a form three with multiple suicide attempts. I’m scared to go back on them but my doctor says it will be ok and my body has changed a lot in ten  years.
I took my first dose of Remeron. I guess it’s all a science experiment from here .