hey I just got back from a big holiday in Europe, but near the end of it my stomach started growling all through the day, my body aches, lightheaded sometimes and I always feel nauseous when I lay down on either of my sides, any idea what it could be?
Hello! Welcome on Chat Doctor! Your symptoms seem to be related to a viral infection. Other metabolic causes (chronic anemia, electrolyte imbalance), etc. can not be excluded either. That is why, I would recommend consulting with your GP for a physical exam and some lab tests (complete blood count, PCR, ESR for inflammation). Meanwhile, I recommend having some rest, taking plenty of fluids to stay well HY Chat Doctor.  Ibuprofen can be helpful against muscle pain. Hope you will find this answer helpful! Kind regards,