Nauseas can come back?

I had mild nauseas at the beginning of my pregnancy up to my 12th week. I never vomited just some bouts here and there of awful nauseas. Since my 17th week digesting has been pretty hard, lots of reflux but that’s it. I’m now 18w2d and I have been having my usual heartburns and acid reflux which I read are very normal since baby is taking more room and squishing everything up but for the last three days the nauseas are back full force morning to night on and off and last night I threw up my entire supper. Is this normal or should I consider seeing my doctor about it? Can nausea do a come back after being absent for over a month?