Nausea at Week 24

Hi mummies, do you still have nausea from week 24 onwards? My nausea stopped when i was Week 18 but it recently resurfaced again when i was at Week 24 onwards. Its not all the time but it usually starts after my dinner or when i alight from taxi. I have asked my gynae about it and she said it is not normal and asked to monitor. She even mentioned may need to go for brain MRI scan but i hope i don't need to do that. 😭