AF :(

So after missing my period for February 9th and being convinced I was pregnant despite negative HPTs, I started spotting this morning and I believe AF has arrived :( I don't understand why I missed for February and now my Glow ovulation predictions are messed up. It's not showing an ovulation period for me this month and that I won't start my period until the end of next month?! I'm so confused. I guess I will just count 2 weeks from today and assume I am ovulating?