My son is 25 months old, and I am trying to wean in order to conceive again (I had an early loss, and I am a bit older, so I think it does affect my hormones)

My question is he sometimes cries and begs for "bootie" and I feel so bad. We weaned slowly, even winding down to a session every couple days. We made it 4 days, then he got sick, so I did his night time session again two days ago. We skipped yesterday pretty easily, but this morning he was crying begging for it. I feel so awful - did anyone else deal with this when weaning?