Sinequan

I was prescribed Sinequan for relief for Chronic Fatigue Syndrome.
It served well reducing the Gastric Reflux, Boosting my immune system, (evidenced by when I ran out for one day, I caught whatever was in the house, had allergic reactions to the environment etc., It also, I am sure let my body think it wasn't stressed as I watched my house burn totally.)
Now I am using Doxepin since Sinequan is no longer available and I have been very sick most of the winter with fevers up to 104 +
four different times.
I had not been sick for years.
If Doxepin is not going to keep me balanced, I am thinking I should talk to my primary about dropping it.
Unfortunately my infectious disease doctor no longer takes my insurance so I am not being carefully guided. He told me not to go generic on this.