My baby won't nurse 😭

So it's been about a week that my baby girl for some reason has stopped breastfeeding, she used to love it & suddenly one day she stopped she will be 12 months on Feb 1st !! Any mom's have had something similar happen ! She does bite me because I try to give it to her , also I noticed she will suck for a sec or 2 then pulls away then does it again then she will stop !! This passed 2 days she will nurse at night and she will take it but not tru out the day or often like she used to 😭 I'm so sad about it ...help should I just stop trying ??