I hav dull pain in end of rib cage in centre after 2 hours of eating.crp,cbc,tsh normal in value.I hav IBS from 3 years  endoscopy, colonoscopy with biopsy are normal..monthly or 2 months I hav 4 times semi solid,soft stool with mucus and every time gas passing through anus 8 -10times per day some times bad smell comes 1month back i hav 3 timex stool in morning with yello mucus mixing  little drop blood around semi solid stool,back pain.these are symptoms of aIBS or not. iDoctor give some medicines and suggested to do lab test?when I test?can I fasting to given blood to test?attached lab investigation