I Think I Am A Hypochondriac. Yesterday I Got Some

I think I am a hypochondriac. Yesterday I got some bad tasting waster from a Aquarium filter in my mouth. I may have swallowed a tiny bit of it. Now I keep thinking I have those Brain eating Ameba's. I have a headache and a neck ache but no fever. I think it may be related to my anxiety as well. Any advice? I hate feeling this way.