i guess i am seeking advice on possible remedial solutions to a new symptom. my anxiety has never been this bad: i have started having heart palpitations. i called 911 because i thought i was having a heart attack. it was just the anxiety. 
this symptom only recently started after a situation with an ex boyfriend. last month, he claimed to have tested positive for an STD, and he blamed me for transmitting it because i was assaulted when i was a minor. however, he sent me a message on friday in which he alluded to having lied about the entire situation, and this makes it 10x worse. he used my traumatic experience against me in this fictional situation and i still can't believe his cruelty. i continue to repeat it to myself because i can't even begin to grasp the severity of his false accusation. i don't think that he sent me that message for my wellbeing (as it's harmed me rather than helped me), but i think he is coming to the realization that he is a bad person and he feels guilty. confessing to me is a way for him to feel like he is a good person, despite the fact that his unsolicited attempts to contact me have only caused harm. i have since tried to cut off all contact, and he still doesn't stop. he called me from two different phone numbers because i blocked him, he won't stop sending dms or texts and he seems angry that i am not responding, and he has started to ask our mutual friends about me. he sent our friend a message in which he blamed me for his dislikability among our peers and i think he is upset. i never asked anyone to stop talking to him, but i have a lot of friends that go to our university who unfollowed him on their own accord. anyways, he won't leave me alone and he genuinely terrifies me. i have since gotten university officials involved but i am afraid this will rile him up more and cause him to physically harm me. i woke up yesterday and it felt like i was having a heart attack. i thought i was going to die. i went out on a walk and i saw a truck that resembled his, and i had a very bad anxiety attack. i am completely paranoid and afraid, and i have stopped eating because i can't keep anything down. i am unable to function regularly. i am so scared of him and this experience has been completely traumatizing. i am staying with a friend of mine until it blows over, but i am unable to deal with this new symptom and it is actually quite physically painful. i am on anti anxiety medication and i have ativan for severe circumstances but none of those are helping. not sure what to do