My partner said something to me that wasn't very serious. He just looked at me and said , "you take everything -too- seriously."

Something that a normal person wouldn't even affect. It took my breath away. We were at a restaurant and I could feel it bubbling inside my chest. I wanted to scream but obviously that would be inappropriate but thats how I felt. I silenced myself and ate lunch, shoving it down. 

On the car ride home I leaned my car seat back and felt the sun on my face through the sunroof of the car. He asked me, "is everything ok?" I nodded yes. I imagined myself leaving my body and floating up to the sun, far far away,  nothing but warmth. No more feelings. Responsibilities or anything. Nothingness. I wanted to leave...

Has anyone else felt this way? I'm thinking about getting on medication. I feel anxiety all the time. I just don't have anyone to talk to about this guys. If I told someone I know they would think I'm crazy.