Single mum about to have another..

nicolababynum2

my little girl is 3 next month, she is my world!! I am pregnant again and due in 5 weeks!! Things never worked out with the dad who is also my little girls dad.. Me and my daughter spend everyday together, my question is iam worried about her feeling left out and having to share me will be hard for her, I'll have baby to deal with constantly.. How have other single mothers coped? Any advice please thanks