From last 5 days i'm suffering from breathing stuck issue facing issue in deep breath taking many time felt it stuck and even breathless also feel many times a day .it started 5 days before when i'm taking lunch. My spo2 99 plus also under 100 .bp also quite normal .it start when I wake up most bother in when i'm taking fast bathing eating and some more activity .even when I lie down in bed changing position sometime cause symptoms. I felt left side little pain. Ecg is normal sinus tycadgeia found .i'm taking medicine but not helping. Xray also normal .what can cause it I don't know. Kindly advise something. Yawing whole day to accompany breath stuck. Little heaviness in chest.