For last two days i feel like i am not breathing with ease, yesterday night while i am trying to sleep, i felt heavy in breathing, i was breathing very fastly, yawning constantly and my heartbeat also rises with anxiety of this. my nose is clear also hemoglobin is normal, so i can't understand why this happened. And with that fear everytime today, i feeling like my breathing is not normal everytime i am focusing on my breathing and this is making me anexious. please help. I have no chest or throat pain.