What is happening

Kayla

Okay so my bf and I dtd on Christmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a>.Thursday I was supposed to start my period, which is normally very heavy and i cramp a ton, only this time it was very light and only lasted 2 days. Then I started having light brown coming out. I took a test today and it was negative. But I’ve been so tired and I’ve had a killer headache the last 2 days. What do you think?