Need some help

Hello again. I've got another issue I've been having for about two months or so... just wanted to share with you guys because I'm pretty concerned about it. 

I keep getting these strange episodes, they're kinda hard to describe. They come on randomly, even when I'm not anxious at all. I'm  happy and talkative one second and then it's just like a switch goes off and I can barely talk, and I'm completely spaced out and stuck in my head. I feel completely disconnected from the world, like I'll just collapse and die. I know it sounds like classic disassociation, but when it happens I get very weak and fatigued, like I have to hold my head up with my hand to keep it from dropping down. ALso, my eyes like lock onto one place and its like I can't focus on anything and my movements become very jerky and I get this strange pressure between my eyes. It's very unnerving.. and it usually lasts a few hours before I feel normal. My pulse also feels very faint when this happens. I don't know what's wrong with me... I'm so scared it's a sezuire or something. It happened today while I was out with my dad and it was awful. 

I forgot to add but I also get this strange taste on my tongue. Like bitter and tangy. Kind of like blood. I hate this.

I am sorry to hear this. May I enquire if you are taking any medication at all?  

No I'm not. I used to take lexapro, but I stopped taking it after a week because it made me feel like a maniac.