It's 3am i just woke up sweating vomiting and a racing heart. is this likely a panic attack or something else?

Deep breaths! Take: your temperature. Even people with anxiety get sick. If you have fever, take an adult dose of Tylenol (acetaminophen) or Ibuprofen. If you can't sleep, take a tepid bath. Symptoms that awaken people from sleep are usually medical. Especially since you have a baby at home, see your doctor. If it's the " flu", Tamiflu can shorten the course. Go to an ER if your symptoms worsen significantly before office hours.