Hypothyroid and pregnancy. Get pregnant.

April2020 i conceived naturally, married on jan2020, that fetus misscarried in june2020 that time only my gynaec find out i have hypothyroism TSH level 9 ...they advised to take thyronorm 50mcg daily ...i follow this medication regularly. After 3 Months TSH level 0.54. so my gynaec adjust dosage as mon-friday 50 mcg and sat-sunday 25 msg ...next 3 months TSH level 8.33 suddenly raise , so again doctor change my dosage as 75 mcg now my TSH level 6.22 ...i try to get pregnant but this one year period i didn't get conceive. My tsh level also fluctuating so i worried lot.  last month i am going to follicular study with clomid and hcg shot given but again pregnancy not happy..recent days after ovulation my belly become very fat, i don't know the reason..  thyroid dosage 75mcg is ok or not for me...kindly tell me the solution to get pregnant ...