Parasite in stomach. I should look for?

Please suggest me which kind of Doctor i should look for? I might have parasites in stoamach. I have synonyms of parasite in stomach such as:- -Bad Breath (Even i brush my teath properly no gums broblem ,bad breath from inside). - always i have cough in lungs, but i do not have cold. - Body temperature are hotter than others but i dont have fever -Ithching in body, like Toes, legs. -Nose itching, some very small white pimples on nose. - i am very weak..i tried so many times to do push ups still i cant do 1 proper push up. - Acidity -Mental fatigue. - Anxiety - Body fatigue. - Saliva come out my mouth whenever i sleeps in a day. -hair fungus is very normal. -poor nails -i feel much more thirsty, no matter how much i drink water. -Not get sleep easily but once i sleep ,i sleep alot.