Ladies after some views and advices

Well I have a girl who will be 9 in July and I have a son who will be 5 in April... my question is has anyone felt 50/50 about baby number 3? Like how did u make ur mind up.. because I still am confused been thinking over n over for a while.. does it b harder with 3? Did u fee scared of having a baby again and have the sickness... how would u know if u have made a decision