Situation sucks, but you didn't do anything evil. Be aware of it going forward and be understanding of whatever response this person has, but don't treat yourself like a demon. You're human and you were working with the information you had at the time.

Personally I'd communicate this kind of info over the phone or in person and wouldn't send over text. I'd say through text that it's some important shit you feel like you need to discuss over the phone, even if only for a few minutes.