Morning sickness or just sick?

Jennie • 🩷🌈🩷🌈

How can I tell if I'm having morning sickness or if I'm just sick? I'm a teacher, and my whole life I have been known to get sick the first week of school. Now I'm 4 weeks and 3 days pregnant and I can't tell if that's what this is. This morning, since I woke up at 2:30 I have been feeling waves of nausea on and off. Is it too early for morning sickness? How do I know what this is?