Aw, ganyan talaga ang babaguhan nila around that age, kaya hindi ka nag-iisa! A few of us had similar situations, one of my mum friends' LO also suddenly rejected the bottle kahit formula-fed siya before, at nalito rin siya kung kumain ng sapat. Since undersupplier ka, I'd really suggest checking with your pedia or a lactation consultant kasi important malaman if LO is getting enough, you can ask them to check baby's weight gain and maybe guide you on how to tell if she's satisfied (wet diapers, pooping regularly, weight check). In the meantime, try pumping a bit after breastfeeding para ma-know mo roughly kung gaano karaming milk ang nakuha niya, at don't worry kung natutulog after feeding, lots of babies do na, lalo na kung comfort feeding or just tired na sila, pero better confirm with doc para peace of mind mo talaga.