My bf sounds annoyed when I have anxiety attacks?

I was on the phone with him this morning and I was having an anxiety attack and he knows I start crying as a natural reaction from my episodes and I wanted to hang up so I can control my breathing but he told me to stay on the phone w him and he was getting upset that I wasn’t talking to him at the same time I was having my ep and he knows I can’t talk while trying to control my breathing and so he’s like it’s fine and then he started blasting out loud music and it made me even more nervous and I started crying more and I asked him if he could turn it off but he got mad and said “there it’s off you aren’t talking to me so I got bored and put on music” is there any way to let my boyfriend be informed of my anxiety attacks? I don’t think he knows they are serious