Breathless empty feeling

[Jo96]

I have this experience where I feel totally disconnected from all my senses and breathless  and I’m just floating in pure void or emptiness. It’s like there’s this hidden sense underneath my senses though that is literally nothing. I’m not really meditating or doing any spirtual work. It’s quite terrifying, for a while I was panicking because I couldn’t face it. Felt like I was dying. It just comes on randomly. 
 

any idea what this is ? Any suggestions to go further ? I was able to face it for 1 minute but it was about all I could take. Idk maybe it’s just in my head