Hey @pie and thanks for posting and sharing these thoughts with us! 
I agree, babies are super cute! I'm really impressed that you've been able to identify the similarities between this interest in babies and some previous manic ideas - it shows great self-awareness and insight.
Given those similarities, going off your medication doesn't sound like the best idea, as you've touched on. I'm wondering - are you currently seeing a mental health professional and have you spoken to them about this maternal instinct?
Looking forward to hearing from you!