No period?

Jessica

Hey yall. So I haven't had my period for two months, not completely strange, as I'm irregular. Always have been. I have an 8 month old, who we planned for and tried for nearly a year! Though we weren't trying this time around, I can't help but to wonder if I'm pregnant? I've had brown spotting every other day for about a week. Each test I take though, is negative. What gives?