You seem quite adamant that you’re entitled to go round to your ex’s. I’d say that it’s more usual not to be dropping in unless you have quite young children, or unless you’ve decided to try and stay friends (neither in this case). I don’t think forcing the issue is going to help anybody.
Try and keep your daughter as your focus. Do you know what you want to say to her? Or how you expect the conversation to go? As she’s an adult now there’s not much you can do to tell her what to do (and you’ll probably find that will have the opposite effect anyway 
), so what kind of advice will you have for her? Is there any support you can offer?