See a doctor: There are lots of potential causes: 1. Thyroid hormone excess (thyrotoxocosis) is certainly possible and easy to check. 2. Anxiety or panic (but does not usually cause weight loss). 3. Stimulant medications like Phentermine or adderal. 4. Rare heart or hormonal diseases. I'd recommend seeing a md soon for a thorough check up including TSH and free thyroxine.
Answered 6/9/2015
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