I think you might have approached them a little late. When I was three months pregnant, I had difficulty securing a nanny already. The liaison told us that they have a shortage in nanny supply these days due to covid. Many parents start reaching out to them once they know they are expecting.
I guess is supply and demand issue plus short notice even before pandemic, standard practice is to book right after 1st trimester what u can do now is to look for confinement tingkat and engage part time helper to assist your daily housekeeping
I think it's due to insufficient supply. I'm due in July and when approach agency in Mar but was told no confinement nanny available