It's hard to say what will or will not be with Hashi's and pregnancy. The studies are conflicting. Having thyroid antibodies means you have a higher than average risk of developing other autoimmune diseases. These AI diseases can cause pregnancy complications and should be ruled out (a few specific tests are ANA and a clotting panel).
I am a person with Hashi's that has not been able to carry a baby to term since becoming ill. There are many with Hashi's who have no problems though.
One recent study suggests that keeping TSH between 1 and 2 and the FT4 level in the upper third of it's range is ideal for fetal health/well-being.
How are you feeling on your new dosage? Do you have flare-ups of symptoms or do you generally feel about the same with some improvement when your meds are increased?
Are you hoping to try for pg soon? It's likely that all will go well; the statistics are in your favor
Love and Prayers, Kelly