Welcome to HCM,
I am glad to know that if you were treated for infertility
and treated for Tuberculosis
and now you are pregnant.
You should consult your Gynecologist and in general anti tubercular drugs are safe in pregnancy
If it is not necessary to give four drug then Pyrazinamide
may be omitted in consultation with your treating doctor.
You can go for ante natal checkup and Ultrsonography to see every thing is fine.
There are some supplementation to be given in early pregnancy with the advise of your Gynecologist you can take.