LO is 10 month old and I just got my AF for the first time. It has drastically hindered my milk supply. I have no back up left. I'm pumping and feeding as much as possible to boost it up but it's a slow slow process and I'm not producing enough for her. LO has never had formula. Just wondering if anyone else has had this issue and what they did. I'm about to buy some formula to be sure she is being fed. If anyone else has substituted like this before I would love to hear some tips and tricks (i.e. How often did you feed them formula). Thank you!