feeling of unhappy

This is my first baby, Im 31 y/o still single but will get married this coming December. I have this feeling na unhappy and prang d ko mtanggap n mgkakababy na ako. Anyone here with the same feeling? I know in the first place that I must be happy since this is a blessing. I have those relatives na hirap n hirap magkaanak despite of everything but now here I am feeling sad and unhappy. I know I feel this way dhl sa hirap ng pagbubuntis ko, sobrang selan. But I am trying my best to be strong for my baby, Am I too selfish to feel this kind of feelings?