Bankroll management, bad runs, and other questions

I play 5/10 limit games at my local casino, and i have a few questions about how everyone manages their bankroll.

I know you should have 300bb backing you. unfortunately, i only have(had) 200bb. I recently hit a bad patch of cards for 2 days straight in about 16 hours of playing(Lost every time i hit pocket aces, hours between playable hands, etc)

I now only have 80bb left in my bankroll, and 5/10 is the lowest limit they have at my casino.

Im wondering from experienced people here exactly how long you think this bad run will last? Is it likely ill pull up in my last 80bb and even out, or more likely that I will lose it all? I do not go on tilt and waste money. I play pretty even keel.

Generally, i buy in for $300, and wait till i have $200 profit before leaving(When i stop having good rushes or when the game gets bad)
Last night, i bought in twice. lost $300, rebought then lost $200 and called it a night. Then today, i lost $300, rebought for $200 twice, and i still was having a horrible patch of cards and turns.

Now i have $800 left from my original $2000, and im a little wary of continuing this bad patch. Since i can't reduce the limit to rebuild, im rather at a loss for how i should approach this dry spell and the best manner of rebuilding my roll to a comfortable level.

Just looking for some advice. I have been lurking this forum for a long time so i figured i would make an account and ask the experts.

Thanks