I know, it's frustrating to have the surgery and then have to wait so long for your band to really start doing its job. Sometimes the careful, incremental fill process seems endless, but it's safer to do it that way because overly aggressive fills can cause very unpleasant complications.
I started feeling a little bit of restriction after my 1st fill, a little more after the 2nd, and the 3rd fill really did the trick. Looking back, I'm glad it was gradual because if they gave me that much fill (2.5 cc in a 4 cc band) all in the 1st visit, my eating problems would have been unmanageable. The way it worked out made it possible for me to practice good band eating skills and slowly adjust to the fills.
Hang in there!
Edited to Add: don't assume your surgeon gives fills only once a month just because they automatically schedule appointments for you once a month. My surgeon will do fills at 2-week intervals if you ask.