What’s going on with me

According to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> my period is eleven days late. My period usually starts a few days earlier than what <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> predicts, so technically I’m later than eleven days. My period in October was a couple of days late and a little lighter than normal. I have taken a pregnancy test about a week ago and it came back negative. I have had a few mild cramps, my breast have been sore, some nausea and more frequent migraines. I’ve also been getting really irritated easily. Also the smallest thing will make me feel anxious. I’m trying not to think about it. For the most part I’ve been able to keep myself busy. But at the end of the day I realize my period still hasn’t started and I start to wonder if the test may have been wrong. This is probably all in my head and next month my period will come.