<human>: Last night I hooked up with someone I met at the bar and she stayed over. We had a great time together last night and this morning and it seemed like we really clicked. She asked me for my number and I told her to text me so I could have hers. I never got her text and I realized I screwed up the order of two of the numbers afterwards. 

I tried to find her on social media but I wasn't able to, however I was able to find someone who I believe is her sister or cousin. Would it be weird if I messaged this person and ask them to give her my actual number? Or does anyone have any other idea of how I could contact her? I don't want to come across as creepy.

Summarize the given text in a few sentences.
<bot>: gave wrong number to girl I hooked up with and not sure if I should message her sister/cousin who I found on Facebook