Long story short I was fingering some girl before we fucked, and once I had 2 fingers in and doing the basics, basically making the "come hither" motion with my 2 fingers inside her, with her lying on her back, she was moaning really intensely.

With every motion of my fingers she'd moan a LOT and look really tense (i know orgasms can look almost uncomfortable for a girl if its really strong), but I mean this girl came in like... a minute and a half? If not, less than 70 seconds.

Personally I wasn't that worried, but I asked her did you cum and she said "I'm not sure"

Which is pretty strange considering she went from wriggling and moaning, to a more relaxed state with her hands still holding me tightly.

Am I overthinking it and she's just being a bit embarrassed about cumming or something? I mean she wanted to come back and see me literally the very next day so I'm assuming it couldn't have been bad sex or fingering or anything..