Heroin both times, way way under a gram. Court appointed attorney will not return calls. What is a usual sentence?

Where? It varies by State.

Charged as a misdeanor, felony, one of each?

We are in Oregon. This will be second felony for possessing heroin under one gram...

Here's the info:

The charge you face for possession depends on the controlled substance or drug you were caught in possession of.

The following chart shows what charge you would face and the maximum potential penalties under Oregon drug laws.

Classification of Drug Charge Potential Sentence
Schedule I (excluding marijuana) Class B felony Up to 10 years in prison and $100,000 in fines
Schedule II Class C felony Up to 5 years in prison and $100,000 in fines
Schedule III Class A misdemeanor Up to 1 year in jail and $2,500 in fines
Schedule IV Class C misdemeanor Up to 30 days in jail and $500 in fines
Schedule V Violation (non criminal) $250 fine

Ref: Or. Rev. Stat. §475