oh kayla what a difficult situation for you. i know it must hurt too but try to realize your mom is not well. i'm not excusing her...she needs help..and a healthy distance from her is wise. her behavior is toxic to your ability to have serenity in your life. unless she gets help-doesn't sound like it-your not engaging in too much with her is probably best. distance doesn't have to be in miles...it's just protecting self by not being around her except when you choose. obviously setting boundaries with your mom doesn't work.
your daughter also is a concern by being around your mom. children learn behaviors good or bad. hopefully you can make some other arrangement so the two of you are in a healthier environment.