Feeling overwhelmed

Don't know if it's just the impending doom of labor and a total life change, or the thought of having my in laws stay after baby is born for days, or the thought of being bombarded by visitors, or just being anxious but I am not so much excited as i am so overwhelmed and feeling emotional about the fact that I will be having a baby soon. 1st baby, 38 and a half weeks and just don't know if I'm ready.. anyone else experiencing this? I feel bad that I'm not more excited..