Did I have an anxiety attack?

Has anyone ever experienced an anxiety attack without knowing it? It sounds like a weird question but after hours of crying (I suffer from depression) I got so sad and felt so hopeless that my body literally shut down and my right arm started twitching. My boyfriend freaked and I tried my best to calm him but I could barely speak or even move. I begged him not to take me to the ER. After a few minutes it passed and I was able to regain control over my body. While it was happening I kept telling myself I could move whenever I wanted but a part of me knew it was a lie. I thought I just really didn't want to but I didn't have the energy. I went limp. I didn't know that could be an anxiety attack until I looked it up...I've always been an extremely stressed person and I throw up all the time when I get upset but I just never thought this could result from it...(I have had somewhat similar experiences in the past but it usually involves hyperventilating and not just going limp).