advice please on family issues

so im trying to get pregant i have pcos and i have 2 kids. im taking medicines to try help me get pregant. well all my family is super judgy on me and if i get pregant and announce it they will judge me and talk so much shit about me and i get tired of it.. i want one more baby before im in 30s because it will be more harder to get pregant... well if i get pregant i wont tell anyone at all im keeping a secret for a while but when i do announce what can i say to everyone???