Hi there. I know this must be a difficult situation for you to be in and I am truly sorry that you've been put in this situation. No one likes being called a name, especially a name that is a negative one. You probably don't even deserve it, which probably makes you feel even worse about it. Unfortunately, some people are very mean and don't really care who they hurt. I know it must be hard to ignore these types of people but you really need to try your best to do so. You cannot live your life allowing people like this to get to you. You need to shrug off these kinds of negative comments and move on.
When people say things like this, usually they are looking for a reaction. Don't give it to them. Don't even stand up for yourself because in doing so, you are feeding them with the attention that they want. If you let it get to you, that will only motivate them to continue acting this way. If you show them that it doesn't bother you, they'll eventually get bored and stop. Honestly, these types of people aren't even worth getting upset about. You know that you're not a bitch, right? That's all that matters. Your close friends and family members know that you're not a bitch, right? Then, that's all that matters as well. I hope I've helped. If you ever need anything at all or feel the need to discuss this further, feel free to message me any time as my inbox is always open. I am always happy to help. Good luck.
Take care and keep smiling.