No guarantees here, but I’ve got friends who recently had a baby and don’t need their body harness any more… frankly I’m not sure they still have it. Where are you located?
Full body harness was definitely the way we went. My partner loved hers (to the point that she almost didn’t want to use a regular harness post partum).
They’re not too pricey, and seem to be worth it if you find the right fit. My partner could lead belay me up until about 7 months before things got uncomfortable.