Your cycle begins on the first day you have regular bleeding. Spotting doesnt count. For example, Cycle Day 1 is the first day of your period; Cycle Day 2 is the second day of your period, Cycle Day 3 is the third day of your menstrual flow, and so forth. Your menstrual cycle finishes on the day before the first day of your next cycle. You cannot find out how long your cycle lasts until your next regular menstrual period or bleeding begins. Menstrual cycles last on average 28 days. Your cycles can be different from one woman to the other. Normal cycles may last between 21 and 35 days. If your menstrual cycle changes by more than two or three days, then it's considered irregular. So 28 days in one cycle and 23 days in the next are a five-day difference, and the cycle is considered irregular.
Start keeping a fertility chart- that will be the cornerstone of your ttc efforts - a daily ovulation calendar where you record your fertility signs, your daily basal temperature (more on that below), the results of ovulation tests or fertility monitors, and when you made love.
fertility blessings!!!