Hi,
Do you have fever on thermometer, or just a hot feeling?
Nausea, vomiting, backache, dizziness, feeling of hot and cold- all these may indicate a viral illness.
Acute gastritis also can cause nausea, vomiting and dizziness (from
dehydration), but we can not explain backache and other symptoms. As you already had your period, and test is negative, pregnancy is ruled out.
Just take
pantoprazole tablet 40 mg once daily before food(acid suppressant) and
Ondansetron tablet 8 mg when needed (for vomiting) for 5 days. Take some rest, drink plenty of fluids and have a soft diet. If backache is bothering, you can take
paracetamol 3 times a day(after food). You will be alright in 3-5 days. If not getting better by then, or fresh symptoms appear, kindly see your doctor.
Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Muhammed Aslam T. K., Pediatrician