My DD is now 14 month old and definitely went through a 9 month sleep regression although really things started going downhill at 6 months, hit rock bottom at 9-10 months, and slowly improved by 12 months or so. For a couple months there she woke up every 1 to 1 1/2 all night long demanding nursing(we cosleep) and we tried absolutely everything I could think of (besides CIO which wouldn't work for us philosophically) including suggestions from the No Cry Sleep Solution (which I highly recommend). We tried ending the suck-to-sleep association, room darkening, a lovey, cue words, white noise, DH sleeping with DD in the same room, in a different room, and on and on. Absolutely nothing made a difference besides time. So all I can tell you is please prepare yourself as best you can by thinking about you and DH can arrange your schedules so you can make up sleep as necessary. I felt truly on the edge of insanity with sleep deprivation during this period until my DH changed his work schedule to watch DD from first wake up until first nap (6 or 7 until 9)- my longest stretch of uninterrupted sleep each night! And know that it definitely will pass, regardless (or in spite of) what you do.