i cant help you with your specific problem, but i can tell you that first of all, babies do NOT require solids before one year of age for nutritional reasons. most of the reason we give solids before a year is to help get used to textures and the idea of feeding differently etc.. but nutritionally, breastmilk or formula is ALL that is needed.
so, what i would recommend is that you REDUCE the amount of solids you are feeding, and that should lead to an increase in her formula drinking. good for you for continuing to TRY to use breastmilk! that is a good idea, that even though your supply is low, you keep trying - a little breastmilk is better than none at all! its good to be flexible. breastfeeding is exhausting, but it is a good thing, and if you feel you can keep up once in a while - like before bedtimes or something, then that is a good thing. if you really dont want to, i wouldnt count on pumping for her to drink - pump to store for an injury! it may seem wierd, but breastmilk is good for healing cuts scrapes rashes, etc. not only in baby, but you too!
my son once fell off the porch and scraped his head really good - put some breastmilk on it once or twice a day for a few days and 'presto!' no scar and hardly even a scab! it was great! also works on eye infections, or just if you have something (like frosting - my poor son at his one year bday party! LOL) in your eye!
sometimes teething can reduce the want to drink.
also, some babies eat a lot, then eat practically nothing during their growth cycle.
heres the big thing; most healthy normal babies WILL NOT STARVE themselves. they will eat when they are hungry, and they will not eat when they are not hungry. it shouldnt last too long and she will be chowing down again, but like i said, solids arent nutritionally necessary - you want to make sure that formula is first. she will eat yuo out of house and home soon enough!
anyway, good luck!