Hi Corgicuddler95,
How did your ex get in touch with your new partner? Can she be blocked? I wouldn't worry about your ex if your partner is understanding and trusts you. If she describes you as something that's not you to your new partner it makes your ex look bad.
Through Facebook so she could be blocked, I'm pretty sure my ex was drunk at the time as well. My new partner has offered to meet up with her to talk about it as well but no reply as of yet.