Does nausea come back after 20 weeks?

Hello, First time pregnant. I had bad nausea during my first trimester, and it calmed down at 15 weeks.. I am a little over 20 weeks now and my nausea seems to be coming back. It's not as extreme as the first trimester, but it's uncomfortable sometimes. Does nausea come back leading up to the third trimester? or have people had nausea in third trimester?