Maybe. A woman's cycle during breast feeding is often interrupted due to changes in hormone levels in her body. It's absence during breast feeding is considered normal. However, every woman is different and each cycle's reaction to breast feeding will vary. You should consider yourself fertile during breastfeeding, as ovulation may occur without warning & with any minor alterations in feeding schedules.
Maybe. If you are breastfeeding exclusively, you have a baby less than 6 months old and are nursing frequently, meaning, every 3 hours during the day and no more than 4 hours at night, you are practicing "lactational amenorrhea." this method can prevent your period for months. If any of those requirements aren't met, then you may start to get your cycle earlier.