Diverticulitis???, need some help

hello , I've been feeling so unwell for past few weeks, I am really hoping my symptoms are related to diverticulitis as I was told via endoscopy 5 years ago that I have it. But my symptoms are lasting so long now that I'm extremely worried. every day I feel nausea, pelvic and leg pain. no energy to do normal stuff. take amytriptoline and panadol daily for pain. I get awful sensation in lower left side of what seems to be bowel. I suppose what I'm really anxious to know is does anyone know if symptoms of diverticulitis can go on daily for weeks. I had camera into stomach in feb which showed gastritis, had abdominal ultrasound in march, also clear,had full ct scan 2 weeks ago also clear. 4 lots of bloods since jan, all clear. problem is these awful symptoms are still here every day. Any help would be so appreciated.