Cold streak odds, is this possible???

[Rubber Soul]

Well I guess anything is possible, but has anyone gone through a streak (over 25,000 hands) where you have lost 80% of the hands (when the pot was over one full buy-in level in a nl cash game) when you were a 85% favorite or better post flop?? I have had 18 straight winning months at online nl cash games and I have not changed anything and I haven't tilted... Is this a once in a lifetime bad streak or is there any mathematical logic here???