Okay so I been on and off of this site for at least a month. I use the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> to keep track of my ovulation and period, last moth my period was three days late and this month it's way too early. I never really had an early period but it hasn't even been 28 days since last cycle. Keep in mind I have been trying to conceive since the beginning of the year. What could this be?