Heat anxiety! can anyone relate?

My family and i moved to a humid country and I came from Washington state. Its been 7 months now and this July seem to be a very hot than other months;

How my anxiety started is when I was riding my motorcycle and I remembered how extremely hot it was and how I couldn't catch my breath and the deeper breath I took the more light headed I got. My heart started pumping very hard and I felt I was going to faint cause of my dizziness . All I could remember was getting home to calm down. I ran in and gasp for air with the A/C turned up and I felt better. Then a week later I noticed I started to panicking and not able to breath when it felt very hot out. I am so upset because I cant seem to shake it off! It seems to trigger everytime I step out ans when its extremely humid.

Anyone experiencing this ? Whats helping you? Doctor prescribed me XANOR but I refuse to take it. Im just worred ill have to rely on it. Also I searching on the web that it doesn't so well when taking omeprazole.