Nausea comes back????

I had really bad nausea my first couple months of pregnancy. I couldn’t eat anything, was basically bed - ridden the whole time. It finally went away and I haven’t had any problems until the middle of the night last night and this morning. I am currently 28 weeks. Is this something that comes back? Could it be something else?

TIA.

Sincerely, a first time mom who questions everything and HATES throwing up 😭