I am pregnant, is it twins and are my thyroid levels normal?

Hi doctor I am 5 weeks 4 days pregnant. Please let me know if I need to increase thyroid dosage I am currently taking 50. Also the hcg levels look elevated to me is there a possibility of twins. Or does that indicate a singleton pregnancy? I am just wondering if it is multiples as it looks high to me but maybe it’s normal for a single.

Age: 25
Female
Medications: Euthyrox 50

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