hey air,i have your same symptoms,eye floaters and all,what i found out it is,it is canditas yeast infection in your sinus cavity,do the spit test,first thing in the mourning before you drink or brush get a clear glass of purified water and spit in it,after a while you will see your spit look like strings sinking to the bottom of the glass.also is your tongue white in color in the mourning?do some research in the canditas section,hope this helps.