Hi hun I agree that your DP will probably be shocked by how much time a baby needs! I have hired pregnant people plenty of times for contract roles or temp roles and it can be a great arrangement for both you and the employer. One because you know you can work for x number of the months and your employer is safe in the fact that you won't be off trying to get a full-time job which happens a lot with temp employees! Start scoping around now at agencies and see if you can get some level of comfort around potential temp roles just in case you need it.
Goodluck!