Thanks for the comments. I saw a doctor the next day and was put on medication [synthroid 150mcg]. After 3 wks of treatment, I got my lab results done. Now TSH is around 2, FreeT4 is normal too BUT TPO is way high around 3400 [normal range is 0 to 60]. Not sure what is the implication of high TPO. I will be following up with the doctor soon. I hope high TPO doesn't affect the baby.
You MUST take medication as you are risking your baby's and your own health. An 84 TSH is incredibly high. Like a diabetic having her sugar levels 600!!!! Your TSH should be around 1!!!!! I think you should ensure that you get treated firts so you can later carry out a healthy baby. I have no idea how you got pregnant with such a high TSH number. I wonder if you have antibodies? I wish you good luck and even better health!
You need to be on synthroid (or a similar med) as soon as possible with a starting dose to be determined by an endocrinologist or OBGYN but definitely not less than 100mcg/day (a current study on this starts women at 150mcg). This is safe during pregnancy.
There is an increased risk of miscarriage, pre-term labor, high birth weight and some evidence of neurologic (eg IQ) development problems. But starting meds now can result in a normal pregnancy.
Also, with the history of postpartum thyroiditis, and the current hypothyroidism you likely have hashimotos and will be on synthroid (or a similar med) long-term.