Can someone please offer me any advice / reassurance. 
i feel so unwell both physically and mentally. 5 weeks ago i had an upset stomach which resulted in diarrohea, following that i started to have 4-5 BM a day that were loose for a couple of weeks. That has since reduced to one to two which alternate between firm and soft. I also have tailbone pain. The worst symptom is bloating and tenderness in my lower abdomen all the time. it never goes down. i also have intermittant cramping and random stomach pains with some nausea. i lost my appetite but that is starting to return. ive been to my gp who thinks its irritable bowel and will settle. She has done full bloods, ca125 and stool samples for blood and infection. all were negative. I've had an pelvic and abdomen ultrasound that was normal except for bladder retaining some urine. Gp not concerned. should i be reassured? GP doesnt seem concerned at all but im not getting any better and anxiety through roof.  Any advice / reassurnace would be greatly received.