A Little Lost

Well it's been at least a month since I've written anything. I've been feeling a little lost. It's like talking to my best friend, then she goes on vacation and I can't chat with her. I miss it. I know that the best way to remedy it is to just sit down and type but it's hard. I have trouble focusing and can't seem to stay on subject. I have about a 1/4 of a book written. I left my main character pregnant with twins and that's about it. I have a lot more planned for it and I just can't get to it. I also have about three other half written books. So what is the problem that I can't finish what I start? Short attention span? Maybe...maybe just too many kids not enough time.