I was diving the lake I live on in Ohio and got water into my nose approx 10 days ago. Then 6 days later developed nasal congestion, facial pressure, and felt tired and ill. 7th day out I had a bout of early morning diarrhea. 8th day I used a nasal spray bottle to irrigate my nasal passages and felt better. Yesterday 9 days from diving I've had a slight frontal headache that to me seems to be from sinus pressure. My ears crackle when I swallow. I have a green mucus and post nasal drip. I feel slightly ill but it really hasn't stopped me. I've had a normal temp and normal sense of smell. My concern is though I can't seem to get the anxious thought of a naegleria fowleri,the brain-eating amoeba out of my head (no pun intended). I know the odds are slight to nil but its 100% if it happens to you. Should I be concerned?