Having another baby with my ex

So my ex and I had a baby 6 months ago , we had agreed that we will have another baby 2 years after her together bc we want to try for a little boy . He told me about 4 months ago that we shouldn’t talk about until it gets closer , but he’s going into the military now and I think now would be a good time to start planning it just Incase he has go out of state . And in order to have our baby’s to be 2 years apart we have to be pregnant no later then October . Should we start planning now or just see if end up hooking up

The reason why we want a baby together : we still love each other but our time to be together is not rn , but we had plans on how far apart we want our children before we broke up and don’t want to break that plan bc we are not together and we want our little one to have a full sibling.

Not everyone has to be in a relationship to have a baby I don’t even want to be married but I want kids , I was going to do have a special donor if he said he didn’t want to do it .