Hello @happyat76 — I like you member name. I will be sort of happy at 76 the end of next month. I have sleep apnea but have not experienced pain like you described in the breastbone area. I did find some information on Mayo Clinic's site that I think is describing what you are feeling.
There is another discussion here on Connect that you may want to read through and post questions to other members who have experienced similar symptoms. @merpreb, @shshank_gaurv, @grandmar and @virtuous69 may be able to provide some suggestions from their experience.