Hello, I Had A Thyroidectomy A Year Ago And My

Hello, I had a thyroidectomy a year ago and my endo recently decreased my synthroid from 112mcg to 88 mcg because I am trying to get pregnant. I'v been reading stories of people miscarrying because of their hypothyroidsm. Please help me understand why my dose is lower because it's making me hypo. My endo told me it can't be too high or else it will increase my risk of miscarrying, but I'm reading other people's stories saying that it's too low. Thank you