I'm totally confused with my EPI vitamin intake

I'm totally confused, I take my PERT with meals I understand that part but the the fat soluble vitamins A D E K , I'm reading that I have to take this with my meals also ? But my my multi vitamin says I can only take 1 a day ? Should I be taking more vitamins ? Pls can some one break this down so I can understand it . I have EPI . Anyone with EPI tell me what is your regimen when it comes to taking vitamins. Is the one multi vitamin I take in the morning enough. 80 days in with the EPI and I'm still waiting on a dietician from the NHS , I've literally googled everything but still confused with this. Maybe that's why I'm getting headaches because I'm doing it wrong