Nauseous at 21 weeks...

I’ve only had small bits of nausea this pregnancy, no real vomiting. Suddenly last night I had a vomiting episode and I woke up feeling nauseous again. Is this normal/okay? It may have been my dinner last night (it was breakfast dinner- fried potatoes and eggs with spinach and sausage). Baby is definitely still kicking, just felt some. I just want to put my nerves at ease if it’s possible. I have a doctors appointment on Monday.