Having Intestinal Pain. Doctors Say IBS And Depression. What To Do?

Hi I have been having intestinal pain usually first thing in the morning after I eat which has not gone away for around 18 years. I also have loose bowel movements that are offensive. I have had the coeliac test, gastroscopies, colonoscopies, anti-depressants (which cause migraine-like headaches), CT scan found some shading around the terminal ileum but the colonoscopy ruled out crohns and IBD. Doctors keep saying IBS and Depression. I don't have depression, I work in the psychiatric field so I think I know what the signs of those are. I have in the past had heavy periods but I am now going through menopause at 45. I tend to have low ferritin levels and my thyroid is borderline but not on medication. I don't know if this is related but I get flu-like aches and pains in the body occasion and dizziness but my blood tests always come back normal. I get sinus headaches but I know this is not related. I have done the lactose free diet for two weeks and know that it is lactose intolerance. I am allergic to bees and rye grass (confirmed).