refusing to nurse

Ana
I have a 6 month old baby she is on day 2 of refusing to nurse . She used to refuse the bottle  but now she takes it like a champ . I offer my breast everytime for about 5 mins before she just cries bloody murder and I give her the bottle . She has two teeth and she recently came down with the flu . She was nursing fine even with the flu and suddenly it all stopped . She also bit me twice and I screamed maybe she got scared . I'm really sad 😭 i need advice on how to help her get back on my boobs 
My boobs are killing i been pumping .
Is this the end of breastfeeding ?