TMI--

I did not have a period last month, the month before I was only spotting brown, which this month I was spotting brownaattthe beginning of my period. I started my period finally yesterday. I was using premom app and late 21 days by the prediction on the app, but my period never seems to be trackable.

Do you think I'm irregular or have another underlying problem? According to the app I should have had my period in a couple more weeks and ovulating today. I dont use ANY form of birth control and I'm not TTC right now..I'm almost 30. My normal period is heavy, changing pad every 2-3hrs.