TW:Am I overreacting? I’m having a panic attack😨

So I was enjoying my Friday evening and then I got a random text from a ex who was very traumatizing for me, through out dating him, he never physically abused me but sexually abused me and constantly manipulated me, took my money knowing I was vulnerable towards him and he took advantage of that all the time.

Just a horrible person, not to mention his breath always stinked and his hygiene was so poor. Sometimes I wonder why I put myself through that knowing I deserved better.

we broke up last year around this time and I moved on with my life and he was in prison again, ( for begging on the street and he had substances on him) however the text said "hey this is (his name) I just wanted say hi 👋🏾" mind you I was smoking 🍃 while seeing this and my body instantly got into a panic attack and I have been shaking in fear, I’m honestly scared. Am I overreacting? My anxiety is on ultra and idk what to do 😔