Morning sickness. Is this a start?

I am 8+3 today and I thought I was lucky to avoid morning sickness. But for the last few days I've been getting this wave of nausea feeling in the morning, which gets a bit worse when I have a glass of water (I usually have one before breakfast) and goes away when I actually eat. Is this the actual morning sickness? I don't throw up and I don't feel super bad, but it's still feels like slight nausea.