There's still an entire third volume left to go, so no need to worry. Baka-Updates says that the series is still ongoing, so there'll (hopefully) be a fourth volume too.
The end of volume 3 says volume 4 is scheduled for next spring. Currently the latest chapter I could find is also the last chapter in volume 3 though, so I don't know if that date will still hold, but I do know there are more chapters coming after volume 3.