What do i do? my friend made false allegations to dyfs?

ya so the other night my friend and i got into a fight because i wasnt sure if i could hang out. she gave me **** so i told her how i felt. she said well guess who i called. i have a 16 month old son and the stupid ***** called dyfs on me! she said my son had a wet diaper and i went upstairs while he was crying! i did no such thing. she says i dont take care of him and i do! i pay for his food every month clean diapers clothes everything. so i told my mom what she did and my mom flipped out. she told my friend off. she was mad that my friend made false accusations to dyfs. but my friend said oh dont worry they need three calls to investigate. thats not the point. the point is she called in the first place. i am a good mom and i always take care of my son i never neglect him or hurt him and my mom who lives with me can back me up on that. my friend said the reason i got so pissed was because i was doing something bad. thats not true at all! anyone would get pissed if someone called dyfs on them and make false accusations. this is a really serious matter and my friend acted like this was nothing. she wanted to stay friends and everything and i told her to get away from me and never speak to me again. my mom is shocked and mad that my best friend would do this too me and make up so much horrible lies about me. she told my friend that this really hurt me and her bad and she just created a whole mess of issues for no reason. i hate this girl with such a pion now cause of what she did to me. should i speak to her and give her another chance or should i cut this friendship off forever? i really dont wanna bother with her because of this. it takes meanness to a whole new level. can i get her in legal trouble for making false allegations? or do i not have a case? she has done all kinds of mean things to me in the past but this is the worst thing she ever did to me. she said i did mean things to her, and ill admit yeah when we had fights i would flip out and get mad but i never did anything serious like this. should i talk to her again or get rid of her and move on?