Is this real or is it my hormores?

I feel terrible to admit this because many people suffer from infertility issues here, but I have been feeling this way for the past 7 days now.... I have this consistent feeling like I don't want the baby anymore. I am 17 weeks, have a very strong support system, and although the father and I are not together he has finally stepped up and is trying to be a better supportive partner..... But I feel like my life would be better without a baby... I am meaner to my family and find myself looking at my nephews like: OMG when I become a mom my life will change forever.... I have always wanted to be a mother and wife, but now..... I don't want this baby anymore.