i am 3 months pregnant and about 16 hrs ago i had sex on all fours and heard a really load querfing noise. now i'm having trouble breathing and a bit of chest pain. I do not know if this could be an air embolism from about 16 hrs ago and am wondering if the trouble breathing can be associated with it. It has been about 16 hrs so it's been a while. Does it take that long to get symptoms from an ar embolism?