BSOHF

Is it normal for someone to after brushing their teeth, still taste the toothpaste in their mouth and on occasion cough up spit that smells like the toothpaste? And on occasion have their tongue layered with the spit, to the point of where one feels like their chocking from it?

if hte toothpaste is strong like a toothpaste called euthymbol then the taste may linger on and yes it can stay on the layer of the tongue it isn't very dangerous if u swallow toothpaste unless it is strong in fluoride and it is consumed allot but i doubt it

probebly if you eat it from the tube constantly

Yes, but only if you eat it.