Ladies- I need some help, my gf is really embarassed?

Last night I performed oral s*x on my girlfriend and it was so hot and she really was enjoying it. It was until she had a orgasm and she kinda peed (it was definately urine) on my face. I thought it was really hot and very much a turn on. She was completely embarassed and was crying that she couldnt control her movements. I really tried to comfort her and let her know that she means the world to me and she should never be embarassed and she seemed fine. But when she left lastnight I havent heard from her since. We text or call eachother before bed and she didnt do either last night. And again this morning I called and her roommate told me she was sleeping. Why is my gf so upset especially when I never made her feel uncomfortable? I looked it up online and it seems females sometimes urinate in sex. Mature answers please.