I Have Pretty Severe Vertigo And Recently Vomited About Every

I have pretty severe vertigo and recently vomited about every 5 to 10 minutes with the dry heaves for approximately 6 hours. I went into the emergency room and they have me miclazine, anti nausea meds and Iv fluids because I was dehydrated. I came home and okay for a day then developed a head cold and now cold and lung congestions with yellow phlegm. Now tonight I am getting the vertigo back along with everything else. I am weak, fairly severe vertigo and feel somewhat nauseous. What is going on and what should I do?