welcome to hcm
thanks for the query
tab will prevent you from conceiving
may be your doctor has prescribed you it for regularising your periods
so if your periods become regular you can go for conceive.
try to have sexual relationship during period of ovulation i.e 14 days prior to the next expected date of period
you can take folic acid
till 6 to 9 months. generally it can be started before planning to have a baby