Hi sunriser and welcome to the forum,you can pop anything into the browser and you'll find an answer to pretty much anything,between us all,we've suffered most things
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All your symptoms sound pretty normal,make sure you take a good vitamin supplement
IBS covers a huge range of symptoms,I was diagnosed with it over 25 years ago but just lately found out I've food intolerances,which can also start as we hit meno,so maybe keep a food diary for a couple of weeks and see if there's a pattern to your stomach issues x