Hi Natalia Zylich.
Thanks for your query.
The symptoms complex of intermittent stomach pains, nausea, vomiting, headache, hot and cold flashes and
cold chills for months may be indicative of the following:
Hormonal imbalance either due to your suffering from within or taking some hormonal preparations.
Other probable cause can be -
carcinoid syndrome,
multiple endocrine neoplasia MEN I and MEN II have to be ruled out.
I would advise you the following ::
CT scan of the abdomen ,
Blood : routine and Hormonal studies.
Urine; Routine , microscopy and culture and sensitivity.
Blood 5 HTTA and related tests.
Colonoscopy
All these tests and the additional tests as may be advised by your Doctor, after taking a Third opinion.
Till then you can have a symptomatic treatment.
Antibiotic, metronidaszole, probiotics, PPI like
Pantoprazole,
Domperidone for nausea and vomiting; and any symptomatic and supportive treatment as may be required.
Once the diagnosis is made the treatment will be easy.