Just last month I got my period back after not having it for three years due to pregnancy and nursing. I got my period on the 6th last month and it lasted about 5 days. Then this month I had a little brown discharge so I was expecting to get my period but nothing yet. I hadn't been having sex for three months prior to getting my period back so I know the discharge wasn't implantation bleeding, but have been having sex daily for the past week. So what do we think? Just a late irregular period?

After 3 years of no period, I would have been more surprised if it had started and come back exactly regular. Wait till next month and see what is happening at that point.