Is your nausea consistent?

Hello, wanna check if during your first trimester, do u ever feel being v nauseous today and then feeling better the next day. Then back to getting really nauseous the following day. Like an inconsistent thingy. I felt quite OK ytd with only mild nausea and not vomitting but today, morning and now, the nauseous feeling made me gagged and puked a little of the stomach juice just now.