Hi and welcome to MM Yvonne 26
What is happening with you periods? It's not unusual for the peri menopause stage to throw things off - the menopause can really mess with our heads!!! Read up all the factual stuff on this site to get clued up.
Nausea is common when meno hits but it's better to deal with this with some lifestyle and diet changes than taking drugs like cyclazine. Small meals often, avoid caffeine, fruit juices and alcohol and learn some relaxation techniques e.g Mindfulness, that helps to keep the anxiety under control. It's often a range of strategies, often including HRT, that will help a women through this challenging time.
Read this great article:
https://www.menopausematters.co.uk/magazine/articles-mainly.php#perilsThis may help you to understand what's going on. HRT can help balance things so look under TREATMENTS.
We're here to support each other so keep posting. DG x