State law differs regarding DBA publication. Generally speaking, when publication is required, the DBA statement must be published once a week, in a specific newspaper that posts legal notices, for four consecutive weeks. Publication is included in the LegalZoom filing process.
If you are not having a period or you are having an irregular cycle, you can still get pregnant because ovulation occurs before your period, and ovulation can restart at any time. Young women can even become pregnant before their first period. There are no concrete physical signs of ovulation, so you could be ovulating and not know it.
It depends when you ovulate. For most women it's a week or two before their period, but if you're a teen or have irregular or short cycles it could put ovulation close to your period. You have about (slightly less than) 6 days per cycle you can get pregnant. This is because s perm can live five days and an egg only about 12 hours.