I have a email/pen pal. I send him a lot of emails because I think of things I want to say and sometimes I say things I wish I hadnt and then I send another email appologizing and it just keeps going on like that . He has never gotten upset with me or said we couldnt be friends any more. Im sure your professors understand and dont mind you emailing them. I agree that if you don't have a therapist maybe you should see about getting one. Or, contact your psychiatrist/nurse practitioner about this. Maybe your meds need adjusted.