The symptoms of an overactive thyroid and hypoglycemia are similar- how can i tell which i have?

My symptoms are nausea, feel better on eating food, get shakes when hungry, solved by eating, anxiety, stress problems, problems with needing the toliet more regularly, not increasing weight even when i eat more, some swollen glands and intolerance to milk, severre diarea caused by drinking in large quantities and excruitiating cramps. seeing like energectic hallucinations and feeling really weak and sick, anger problems, weakness in general in my health.

You need a blood test …