Today my breathing has returned to normal and the pain has faded. I got a great nights sleep last night. I’m not sure still what caused the SOB the other night but I’ve logged it into my migraine calendar to see if I can identify a trigger. I also had an albuterol inhaler called in from my doctor. Thank you to everyone for all of your support and advise. I’ll continue to follow the post and update as I seek medical treatment.