So I got invited to this girls house after 2 days

So I matched with this girl online and we texted a lot the first 2 days. She then invited me to her house and I am going over there today. However we haven’t really texted since she invited me home and is waiting over an hour by answering my snaps or half an hour to open my texts. Is she just nervous or has she regretted inviting me over and haven’t told me? I am also going to sleep there but we haven’t really talked anymore details. I guess why I am writing this is because I don’t know why she would be ignoring me when she is clearly online on Snapchat do any of you know why? Maybe some girls can recognise the behaviour?