Why am I breathing but feel like suffocating?

Hyperventilation is Triggered by Too Much Oxygen

Those who are hyperventilating typically take quick, loud gasps of air. Hyperventilation can increase anxiety and make breathing even more difficult. You may feel like you are suffocating, choking or smothering.

Is shortness of breath normal?

About shortness of breath

It’s normal to get out of breath when you’ve overexerted yourself, but when breathlessness comes on suddenly and unexpectedly, it’s usually a warning sign of a medical condition. The information below outlines the most common reasons for: sudden shortness of breath.