Hard to move my hands?

So this is kinda awkward to explain but bare with me.

My boyfriend and I are having sex today and it’s the first time in a month because I haven’t really seen him, it’s been more of a long distance thing.

But my hands started to cramp up? Like the muscles in my hands just.. stopped working..

And I got up and felt super dizzy and my boyfriend said my heart was beating superrrrr fast and I kinda shrugged that off because sex is like excessive motion, your hearts gonna beat,

But I was so dizzy and the room was going black and I think I almost passed out? I tried to play it off but he knew something was wrong.

Idk it’s just really freaking me out to have him on top of me and suddenly I notice my hands aren’t working...

Is any of this normal?