In the last 2 years I've been experiencing episodes of extreme anxiousness/irritability and breathing issues randomly to varying degrees. The often came before I went to bed (or when I lie down often) and randomly before throughout the day. I have done every test possible including tests for heart, lungs, thyroid, diabetes, glycemia, various cancers, brain (MRI), etc. Everything basically. And nothing has showed up except that I was low on vitamin D. I have now discovered that I've developed a caffeine intolerance/allergy. I used to drink lots of coffee, caffeinated pop and have now cut it out. But when I sleep and sometimes lie down, the episodes sometimes come back. I also now have really restless sleep (very broken) and I've started snoring lots. I've gained a fair amount of weigh in my abdominal from age but I'm not sure if that has any relation. Does anyone have any advice or any further tests they would suggest? I'm willing to do anything to figure this out. Thanks.