About N Fowleri infection risk chances.

I am sorry I often ask about this infection. Please forgive me. You all are the only ones I can share my fear with. I was near a small shop which had open drainage or sewage next to it. Suddenly a gush of strong wind came and I could feel water droplets on my mouth and in my nose, even though I was wearing a mask, but maybe because I was wearing it loose. I am very scared now. It's very difficult to avoid such situations with open drainages almost everywhere in our city of Gorakhpur in UP. What chances of infection are there? Does one have to like breathe in very heavily or even normal breathing can cause the amoeba to go up the brain? Or it's usually only possible when water is introduced in nose due to pressure like diving? I would be very grateful if someone can explain.