So this morning when I got out of class at 9 I was sitting down and right before I got up to leave I started having this horrible cramp feeling. I had never felt anything like it so when I stood up I could barely walk cause I felt like I was going to pass out or throw up. It finally passed about 5 minutes later once I got home. <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> says I’m about 4 days away from my period but I don’t know if that’s right. I’m not on any type of birth control. Is this normal hormones ??