It's pretty normal for it to make a return. I've had it occur at all different times and with all different lengths of stay. The biggest thing to watch for is dehydration- call your doctor if you start seeing any signs of that. Hope you feel better soon!
Safe it say morning sickness can come and go anytime during pregnancy.
iam exactly the same first it stop when i was 13 weeks now iam 16 weeks come back i feel so sick