Subclinical hypothyroidism

Anyone have any experience with subclinical hypothyroidism? I had a miscarriage back in July and got pregnant again in September. I am currently 5 weeks 6 days and my doctor called me today to say that my TSH is 2.58. She wants me to retake the exam tomorrow and if it’s still above 2.5 she wants to start me on a treatment. I am so anxious that because I am not getting treatment yet I’m going to miscarry this baby too. I miscarried at about 7 weeks last time, so very close to how far along I am now. I pray to god it’s not too late.