Nausua and stomach hurting after daily vitamins? ?

Most likely the fish oil is causing this. I take vitamins myself but do not take fish oil anymore. The reason being fish oil only made me nauseous and burp uncontrollably.. I would suggest to cut back on all the vitamins and instead choose a multivitamin. And don't forget to drink a lot of water. Also the body tends to adapt after awhile, for an example many people after awhile will find they need to change their dose of medicine because the body is not responding to it as it use to. I think that is the same with you. You need to find out how much you're body really needs. I think a visit to a doctor or vitamin expert would be best for you.