Not so excited?

I’m not sure if it just doesn’t feel real yet or what but sometimes I just don’t feel very excited and it’s our first. Maybe because I’m having twins and the thought scares me and I did NOT want twins (though I will/do love them both now and grateful!) but sometimes I just don’t feel excited about having a baby. We ttc for a 13 months when it finally happened. I’m almost 30 and have a very good job and we have a house but I have not completed my bachelors only my associates degree. Idk maybe it’s combination of everything? I’m not depressed either.

Is it normal to not be excited sometimes?