<s>[INST] Hi, i have a feeling of nausea, im light headed, dizzy getting a lot of heartburn and double vision my head feels like its getting tighter at the back..ive had bad stomach cramp like im going to start a period but nothing came my period last month was early...can you help [/INST] Hello and welcome to " Ask a Doctor" service.I have read your query and here is my advice.It may be stomach flu that is causing these symptoms.An evaluation by your primary care Doctor may give more information about the condition.Hope this helps.Feel free to ask if you have further questions. </s>