Am I Pregnant?

So, my period normally comes when the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> says it's supposed to ,but this month I missed my period and then today I starting spotting really lightly and now it's like a really light period. I took a test last week and it was negative. I don't know, I just have a gut feeling for some reason. On top of all of this, I've been getting terrible sleep, ive been about peeing my pants in the morning on the way to the bathroom, I have cramps, and im bloated and exhausted. I just don't feel like my normal period does. Thanks for the help :)