How much "swing" to expect

[TxSteve]

hi all..

ok...party 2/4

i'm about 7000 hands in (i know..it's a small sample)

over the first 4K hands or so, my cards are on fire..every tptk holds up...draws are hitting...etc. etc. and i'm up 150bb or so

then the bottom falls out...cards go cold on me...and i catch a lot of second best hands which i call down with

i also notice a downward trend in my play (ie i start making bad decision etc.)

over the next 2K hands i lose about 150bb (so i'm back to the beginning)

now..i know for a fact my bad play was a factor in the losing streak...i played too loose...refused to get away from hands...looked at a lot of turns with mid pair when the pot didn't justify it etc.

i'm finding that giving myself a "brush up" course by re-reading some books is helping me get back on track and feel more comfortable again..

but my question is....when playing well...how much of a swing can be expected?

thanks for any input...is there anything more frustrating than knowing i could have minimized my losses during a bad run of cards...but instead i chose to play like an idiot and donate to my fellow players?