To be a bit more concrete, this site has some nice bits of advice for things like time management and avoiding perfectionism: http://ub-counseling.buffalo.edu/stressprocrast.php

Most universities have exceptional resources available, even one on one counseling with qualified professionals, for free. More people should take advantage of these resources, but I assume people associate a stigma with mental health care.

My specific point is that you should see a doctor/therapist to adopt a plan for addressing the anxiety and other effects caused by it.