What does morning sickness feel like?

mi

Yesterday morning I was super hot and had stomach aches and felt like I had to puke, 5 mins later I did. I felt instantly better.

This morning I had stomach aches and was super hot and felt like I had to puke but I never did. I took a nap and have felt fine all day.

I am 7 weeks pregnant. The flu is going around my daycare.

Is this morning sickness or the flu??