Weaning off meds, feeling less symptoms.

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I'm 9 weeks with twins after FET and have been given the go ahead to start weaning off my meds (estradiol, endometrim and PIO), and I'm starting to worry because I feel a lot 'better'. A lot less nausea, less fatigue etc. I'm worried! Is this normal? Should I go see my doc? I knew I'd feel better, but this feels significant, and it's making me worry. Please advise!!