Looking for housing in SF July 12 - July 30 (flexible dates and would be interested in extending until September)

I'm a stanford grad student (female) looking for a place to stay in SF for the next week, and/or until the end of July (or longer)
Flexible on location within SF.
I'll be interning there starting next week until mid Sept, need housing as soon as possible. let me know if you know of anything!