Where did my endurance go?!?

Last year I was in great shape while competing as a member of the BSK Running Center's Elite Racing Team. Then I found out that we had a baby on the way and that dramatically altered my training schedule. Sleepless nights from lil kenny waking up every few hours for food and diaper changes, etc. All of the endurance that I developed during cross country season was fading away to the point that I was nervous even entering into local 5k competitions. Time flew by and the lil guy just celebrated his first birthday so it's time for me to start running again. I am registered for the Rock N' Roll Marathon Los Angeles which is only a month away so I don't expect a great finishing time but it will be a great introductory race for me to get back into the groove of things!