Stomach pain and fever. To consult?

Hi Doctors, I'm having light stomach pain when I eat little spicy food also. And I'm getting light fever in the night time. This is happening from last two week's. Before that my health was good. On Feb 13th I had sprouts for lunch and with in two hours I got headache and vomiting sensation and irritation in stomach. I admitted in emergency in the night and doctor told me it's because of gastric. So they gave me few medicines for three days and to take before food and after food. After those three days I had very slight irritation if I drink water i was feeling better and while eating food slight irritation I was feeling. And then very light fever in the night time. Though fever is not daily. On Feb 20th I consulted gastroenterologist and he gave me a course for seven days. He gave me pantodac 40 tablets and Gaviscon syrup. I'm using it now. Still I'm feeling little irritation and light fever in the night time. I got cold two days back. Please suggest me what specialist to consult