Thanks for the query.
Chances of conception is as high as 85% in the first year of marriage.
So do not panic.
Just give yourself some time.
Ideal BMI to get pregnant is 18-24.
I recommend you to get your thyroid profile done because Hypothyroidism
can decease your chances of conception.
Consult your Gynaecologist regarding dosage of thyroxin accordingly.
Continue taking folic acid
My good wishes with you.