Hi. Read and understood your history of stomach cramps, weakness, then sore throat and cervical Lymph node enlargement. This looks a bit complex one. You need the following: -First of all a proper clinical evaluation why all these varied problems at the same time; to see are you suffering from some generalized disease. - Investigations as per the physical finding, which may be Tests of the blood, urine, stool, X-ray chest, ultrasonography of the abdomen to get the basic tests and ideas; rest of hte tests to support the clinical diagnosis furthermore. -Broad spectrum antibiotic cover along with symptomatic and supportive treatment,. After a course of treatment, to see whether the lymph nodes are regressed now or not. If not FNAC is a must. The further treatment will obviously be dependent upon the clinical findings, judgement and reports . Get well soon.