NOT normal. See a doctor for this.
Def see your doctor. A missing period for 7 months is definitely not normal.
The blood test would confirm pregnancy. While a store bought test could give you a false negative or positive, a blood test from a dr would not. If you are pregnant, a blood test would confirm with 100% certainty if you are or not. Something else has to be going on. Have you talked to your OB about this?
Have your hormones check with a blood test by your doctor. PCOS symptoms and pregnancy symptoms tend to mimic each other.