I'm 29M an never had breathing problems that I know of. I've never smoked either. I lightly walk everyday with my dog. Anyways, I have this sensation come on random throughout the day. I just woke up in the middle of the night with the sensation and checked my pulse ox meter and it was 94! Now it's 98blood oxygen. Out of 100 which is good. I emailed my doctor and hope to get in asap. I don't want to have to randomly have this sensation so i end up in the ER or dead. My anxiety is making this worse I bet....