Nervous and Anxious

The app says I was supposed to start my period on November 1st and so does my normal calendar. I keep up with it on both in case the app miscalculates, which it never has. It’s November 5th and I haven’t started yet. I never had pregnancy symptoms with my now 2 year old daughter, but I’ve had a few the last couple of days and I don’t know if it’s just all in my head because I know I was supposed to start on the 1st but I’m starting to get nervous. I’m on anxiety medicine, but I can feel the anxiety starting to bubble up. I’ve been getting nauseous really easily and I’m always tired. I haven’t had any sickness but I feel like I’m gonna throw up all day long. I’m not sure what to do right now..