Suggest Remedy For Severe Headache And Nausea

i've had a very severe headache.It felt like my head was being spun around even though i was lying flat in bed.I then felt nauseated and threw up twice with 15 minute intervals.I am under stress with the worry of exams and i've been taking 6-8 cups of coffee a day for 3 weeks.There have also been times when i've not slept for three days consecutively.is my condition serious?