How much Iodoral in pregnancy??

I am 40 years old and 4 weeks pregnant. I have been on Iodoral + supps for 1 year now, ranging from 50-100 mg daily or every other day. I recently took the 24-hour Iodine urine test which showed I was excreting about 60%.

My question is how much Iodine should I now be taking? Should I lower it to 12.5 or 25 mg daily? Could too much Iodine hurt the baby's thyroid, etc.?

Thanks for your help.