Whether Test Required or Not? Ayurveda?

Since 6 months suffering from stomach issues, and lost 8 9 kg weight in 3 4 months. Earlier drs saying its stomach infection done 4 5 time infection course. Earlier problem was frequent motions with loose stools 4 5 times a day, cramp, abdominal pain, Mucus in stool. Consulting a gastro earlier he had written many test like endoscopy colonoscopy biopsy ct scan. Since these are expensive tests and difficult test i had taken opinion of another senior most Gastro of my locality. He said that it is due to IBS no test required. Taking treatment weight is stable from 1 month but in between i am having issues like since 10 days i am having constipation and abnormal stools which are semi solid stomach is not getting clean. Headache lazziness. So i am in dilema that whether it is IBS or something else. ? Whether i get tests done ? Whether i get it treated with Allopath, homeopath, or ayurveda ?