Am I going to end up in a body bag over this?

I am bipolar and while at home over spring break I had a severe manic episode (despite the fact that I am indeed medicated) which mixed with my fever and sleep inducing antihistamines, was not good at all. I couldn't sleep yet I felt drowsy, and the overall effect made me lose my mind. I went to Omegle.com to relieve my boredom as a friend suggested, but my mania made me lose all common sense and I actually friended people on facebook (and seriously believed they were my new best friends) I actually ignored my own friends doing this. Anyway, one of the people I talked to seemed to be very intelligent and mature, and we started a friendship. I later learned he was a 23 year old self professed bum, about 150 lbs overweight and living in a basement, never having gone to college. He also seemed too interested in me, a mere 16 year old, and when in my state of believing we were best friends I mentioned we might one day attend each others weddings, he actually said we might be the ones getting married, and was offended when I told him I wanted to remain only platonic. He was constantly telling me I was the prettiest girl he'd ever seen and the awesomest and all. I began to regain my common sense and at the advice of an aunt during a party, I sent him a message saying my parents had forbidden me from ociating with him, and defriended him. He said he understood. Later, the daughter of that aunt made a comment about him on my facebook, and I responded calling him a stalker, and he sent me a message saying that while I had defriended him, he still received news of my activity and he thought I was a (insert c word here) and told me off. I'm becoming scared. He knows my full name, the town I live in, and kept calling me love (ugh!) and generally treating me like his girlfriend. It all lasted three days, but I'm scared, and some friends have pointed out the danger in the situation. I blocked him, but I'm still worried. What should I do?