anxiety and tress can make you tired.yawning has nothing to do withheart problems

I THINK you've asked this before and I said I'd Google it but I was too tired that night. :)
There are MANY reasons for excessive yawning (anxiety is just ONE) but I'm not going to pass that along.
You need to Google it yourself and decide if you need medical attention.

Roland,
People yawn when they're excessively nervous, its scientifically proven-KonstantinO

Ive deffinetly had this, and also some meds can cause this.

no not nessacarily. i yawn alot when i am nervous or am about to cry. so i doubt its cuz of heart problems. its prob just ur anxiety getting to u

I seriously doubt that its your heart; I can remember asking my doc about sighing a lot. He said sighing and yawning are stress responses for some people; they both get more oxygen into your brain - which is in short supply in people like us who 'short breathe'.That's why they tell us to do breathing exercises - deep breaths calm you down because you're getting more oxygen.
Try not to look up every symptom you have on the internet - you will convince yourself that you have every disease and affliction known to man - and scare yourself silly!

I read once it's your body's way of getting more oxygen that is needed.