Felt horribly sick past few days, headaches severe come and go, severe nausea past 2 days but cannot vomit. no bm in past 3 days. please help.

Sorry to hear: That you are feeling this way. But if you really feel like your symptoms are severe, particularly if it’s preventing you from eating/drinking, this warrants seeking an urgent in person evaluation. You could try to set up a HealthTap Prime consultation too, which may allow you to work remotely with a physician to address these issues. But is hard to best guide you without more information.