Morning sickness...again?

Nessie • 💐

So I’m 32-33 weeks pregnant now & for the past 2-3 days I’ve been experiencing some nausea (without throwing up yet). I haven’t had morning sickness or any nausea since about the middle of my second trimester (Morning sickness originally lasted from around 6 weeks until about 20-23 weeks). Now it appears to be starting back? Is this something that happens or should I be concerned? FTM here & would love some info. Thanks!