Agoraphobic?

Been feeling increasingly agoraphobic today and don't know why. That's not like me. I've been pushing myself to go out today more than I had planned because of it. But all I feel is like I'm walking a thin line between barely manageable stress and anxiety and a panic attack. I just got back from walking down to the store and back just to pick up some mangos as an excuse to try to make me confront whatever is going on in my head. But all I feel is relief to be back home. I just want to turn the AC on and wrap myself in multiple blankets and put my head between my knees and breathe until I feel calm again or punch and kick the shit out of a punching bag until I'm exhausted and not leave my apartment until work tomorrow. I hate this what the fuck is wrong with me today?!?!. :/