You sound completely insecure and tortured about the whole business.
If this were a straightforward and sound relationship the kind you could happily bring a child into then you would not be posting the things you are posting.
Listen to your gut.
There's something not quite right about the way he's dropping meaningful comments, but not having a straightforward conversation, isn't there?
There's something unsettling and confusing about him asking you to come off the pill in a moment of apparent passion, but then backtracking the next morning, no?
So you're twisting yourself in knots trying to understand this, trying to guess his intentions and whether they match your hoped-for future.
It really shouldn't be a headfuck like this. If he were ready and willing to raise children with you, you would know it, and be confident about it, because you and he would have spoken about it sensibly and he would have given you all the spoken and implicit assurances that you need.
Don't have children with a man you don't feel completely confident about.