Hi muzzy Im exactly the same - +ve, then -ve, then whatever!
you can get false results, particularly if you are on pregnyl (HCG) for luteal phase support, which I am. And the crinone and estrogen can also do weird things.
It sucks I know. Last time I POAS three times (but those suckers are expensive!) All bfns. This time with the pregnyl (because of getting fewer eggs) I dont think I'll bother until maybe next thurs, the day before, because Im not sure when the pregnyl will be out of my system.
The TWW sure plays with your mind!