25.3 weeks and nausea coming back

L.
FTM, I had bad nausea around 6 weeks till 13 weeks , then feeling totally great , but now I'm 25.3 weeks I feeling nausea again since few days ago , it usually happen around 5pm about 1-2 hours but today I feeling tired and nausea since woke up.....does it meaning something I need to worries? Does any mom have the silimar thing happen?