is it too early to count down?

I am twenty-five weeks pregnant, past the halfway point but not far enough to begin the count down... although I am. I am overwhelmed today with mixed feelings about this baby's arrival. On one hand, I can hardly wait to meet my little boy. I'm dying to see how he'll look... will he have Eli's fair hair and brilliant blue eyes, or will I see more of myself in his tiny features? I think about having a newborn again, cradling a tiny, warm body against mine for hours and hours, stroking his miniature fingers and toes, napping on the couch with my precious little bundle snuggled up into the curve on my body. I am beyond thankful for this baby, the gift of getting to start a new life over again. But at the same time, when I look at my little Eli, how devastatingly fast the changes come, I feel a mix of joy and pride and grief that I can hardly bear. I think about my baby boy becoming a big boy, a teenager, an adult, and I have to struggle to choke back my tears. I'm glad that we are planning on at least one more, so that even when this little guy arrives, I'll know that (God willing) it isn't the last time.