I'm with you!!! I do the same thing and therefore only weigh myself once a fortnight (only because i want to have some idea of how i'm going and the results will hopefully look better fortnightly), and even then i get scared coz they might tell me i haven't lost anything or very much, & so then i think 'why both continuing', or 'Wow! I'm doing so well i can eat more', therefore sabotaging any good results i've achieved.
They're evil i reckon
Probably should only be used as a guide, and as the others have said, go by the way your clothes fit and feel.
I don't have any answers i'm afraid but know that you're not the only one who feels that way.