5 second orgasm or nah??

So when me and my SO have sex there's a point where I'll just grind on his dick and I'll get to a point where it feels soo good and I feel like I'm about to orgasm or something but it lasts like 5 seconds no matter what and it makes my body clench and tingle and my face all weird and idk what it is but it goes away. I tried masturbating by just rubbing my clit and experimenting to see if I could go beyond that point and it'll come like every 15 min but still only last 5 seconds, and I don't scream and my vagina gets wet but like I don't think cum comes out.. Idk.
Idk what this is can someone help