agree with your commenter but just add few more things about next round of ivf
I was also in the same boat as you are now two years ago. I was told that I did not need to stop bfeeding until the day of embryo transfer, so I was not in a huge hurry. What I did was the following,
Feeding bmilk with bottles during the day - I went back to work full time after 4 weeks postpartum. normally, I bfed 4x/day, once in the morning bf work, once in the evening after work, once before bed time, and once at 4 am.
at 6.5 month, add 25% formula to bmilk, for day time feedings.
one week later, add 50% formula to bmilk, for day time feedings.
one more week later, add 75% formula to bmilk, for day time feedings.
at 7 month, used 100% formula when bottles were used during the day.
at 9 month, complete stop bfeeding in the middle of the night (I needed to bfed the baby at night (4 am) frequently even at this age since she often was sick, teething, or something else), but picked her up when she cried for milk. It was the hardest part of this weaning process.
from 9.5 month onward, only bfed 2x/day, once in the morning and another before bed time.
between 11~12 month, only bfed occasionally. our DD asked for less and less since I did not make plenty milk anymore at this stage.
completed stop bfeeding at 14th month or so.
Soon after that, I got preg with our second child. Good luck to you!
Me, 50 DH, 40
IVF, 11/05, 19 embryos(e), no ET, OHSS
FET, 02/06, cancelled, dominant egg
FET, 04/06, 4e, BFN
FET, 06/06, 6e, DD born 02/07
FET, 05/08, 5e, DS born 01/09