I've had the same experience with the constant yawning to get a good deep breath in. For over a year (June '05) I've kept very specific details of every symptom on calendars. I guess I was out to prove something "hormonal" was happening after watching doctor after doctor scratch their head with a kind of disbelief because it wasn't visiable or I forgot a "key" word to describe every detail when I sat in the office. I also went to a cardiologist and she suggested "hormonal changes" which sent me on this mission to find out more.
thinking it could have been stress related after long hours at a hospice caring for my mom then loose her to cancer in March '05 and cleaning out our family home of 25 yrs to sell. later I found that the beginning of the symptoms just had very bad timing, because over time the symptoms didn't subside and I noticed cycle patterns, still very regular 28 days
I highly recommend keeping track of when symptoms occur.
My symptoms were cycle days 7 thru 14. day 15 wake up as good as new.
I've just started a low dose of birth control, FINALLY!
after approx 14 days on it I feel more "balanced" than I have in a yr. Days 13 & 14 were the only days (so far) which were very, very mild days instead of multi-symptoms everyday for 8 days ... yesterday was the breathing and today was alittle moody. tomorrow is day 15
the sleep problems started in May of this yr, I wake up at approx 5:45 every morning for a few days but luckily I'm able to get back to sleep for alittle longer this also happens on the same same cycle days.
now I'm 99.9% convinced it's hormonal and was finally able to get the Birth contol pills, it took alot of research and "fight" to get this far & hopefully I'm on my way back to feeling like me
At first it is very scary not knowing what is happening then having doctors not know, but trust me, chart every cramp, tear & tantrum, it's hard because it will stay on your mind BUT
you may actually watch a pattern develope.