I'm trying to conceive I was taking maca root but stop and now I'm taking prenatal pills what should I do next?

Track your ovulation. You can track your ovulation using basal body temperature, cervical fluid, or urine ovulation predictor kits. During the 4-5 days leading to ovulation, you should try to have intercourse daily in order to maximize your chances of conception. Good luck!
Depends how long. If your periods are regular, you should seek out help after you have been trying for a year, sooner if your periods are not regular. In the meantime, you should have intercourse daily starting several days before ovulation.