I accidentally made my girlfriend orgasm?

I am 17 and she is 19, she lives 5 roads down from me

So we are both saving sex for marriage, but we were kissing and making out and I started to rub my hands down her sides (side of her body) and then my knee was in between her thighs and I guess as we were moving, while making out I accidentally stimulated her without knowing.

She just stopped and her body trembled a bit, then her face went really red and she had this look of embarrassment.

So I told her I am really so so so so sorry and that it’s ok you know we are human and thinks happen,

she is a girl and I do get the fact that a period of stimulation can make a girl orgasm.

I read on some website that some girls get really excited that they just orgasm without someone touching them, I don’t think that’s what happened but then again I’m not sure.

I was too busy saying sorry and trying to make her feel not embarrassed which I failed at (I was digging myself hole and I kept digging it lol).

Any suggestion on how I go about trying to tell her that it’s ok and not to feel embarrassed, I don’t want to make her feel embarrassed around me because of this. I want things back before this incident.