My Doctor Ssat Im Not Getting Enough Fiber So I

My doctor ssat im not getting enough fiber so I eat oak meal ever morning through out the day I eat fruits apple activea night I eat a salad baked fish im only get a little relief ever two days I have to take a laxative I went to the emergency boel was acked up in my back an it keep get worse my back is a10 now with pain I took some epsom salt the doctor say I have no blockage in my exray can you help me sandra