frusterated and stuck

So I'm rather frusterated.  I was able to hammer out two chapters last night that I am pretty happy with, but prior to that, I had not written in probably three days.  I just haven't had the time.  This is really frusterating to me because I was on a roll.  I was writing every day and just getting chapter and chapter down into print.  These last couple of days I have been crabby because I want to write and I don't have time.  Meanwhile all of these ideas are going through my brain that I am now losing.  I also have a lot of ideas about other books that I think would be fun.  Part of me wants to start them and get it down into writing, and part of me is afraid that I will end up with three books and I will finish none.