strange night out

hey everyone, so i went to this new club last week and ended up chatting with this really attractive woman. we hit it off super fast and before long were dancing closely, her body against mine all night. the more we talked, the hotter things got between us, until she invited me back to her place for a drink or two. turns out it was just an excuse to take things further, which we did. we ended up having some pretty intense sex, really exploring each other and pushing boundaries i didn't know i had. feels weird though b/c my girlfriend's cool with casual hookups but always says she never wants anything more than that herself. so even as it was happening last night, part of me kept thinking about how different this woman is from her - hotter, wilder, more adventurous in bed. it's like the kind of experience i've only had with strangers before. wondering if this is normal to get into head space like that sometimes or if i should be concerned my feelings are shifting? what do you all think?