Early pregnancy & high tsh

First beta was 53 on Monday April 25. 4 days later (today) I got my second beta results. They needed to quadruple, meaning it needed to be at least 212. My result was 228!! However….. I have thyroid issues. I got my TSH labs back and it was 6.790. It’s supposed to be between .430 and 3.550. Women with a TSH between 4.5-10 mU/L or TSH greater than 10 mU/L had an increased risk of miscarriage of 1.8 or 3.95 times respectively, compared to women who had a normal TSH (0.2-2.5mU/L) during early pregnancy. I sent my endo a message on my chart so they’ll get ahold of me Monday I guess. I hate waiting that long. I’ve had hypothyroidism for as long as I can remember. With my first pregnancy it was where it needed to be the whole time. But this time it’s like my medication isn’t doing anything. My sister in law is a nurse and she said I can up my dosage to 50mcg from 25mcg that I usually take. I’m so afraid of losing this baby..