Feel Prickles In Eye On Plane, Fainting. What Does It Indicate?

Hello. I am a 33 years old male. I had a flight 2 days ago. After a few minutes the plane started descended, I started to feel prickles in my right eye, which progressively became stronger. Then, I felt like I am almost fainting. In the meantime, I checked my pulse with my hand and it was way above the normal. However, I did not feel any pain or anyting in my chest.

This is the first time sth like this happened to me. I was so worried that I will die. What could be the reason and what would you recommend to me to do?

Thanks,
Emre