Second baby

Hey so my husband and i arent sure if we want another child. My husband and i both wanted more than 1 but now that we have our daughter, who has been fairly easy child, we think we got lucky and as she is almost 2 we all our getting more freedom. But im starting to feel i want another and i dont know if its hormones of missing her being so little... i get sad thinking of her being an only child or spliting my attention, but also i want to be financial responsible. We could afford another but money will be tighter. Can anyone else give me insight ?