Problem

So Iā€™m a breastfeeding mom of a 9 month old. My nipples are are beyond sore her latch hasnā€™t changed. It hard to feed her because my nipples so sore I also havenā€™t got my period in 24 days I went to the doctor because of really bad diet Coke and they gave me pregnancy test and it was negative. Iā€™m just venting! Because I think my bottle going in.