Feel terrible - anal sex and wasn´t clean

I need some help cheering up and looking at this in a mature way. I was with a guy that I am head over heels in love with the other day, and the thing that wasn´t allowed to happen. happened. We have had an incredible sex-life so far and I am very open to trying new things and I happen to love anal sex. So for the third time in our sexual relationship we had anal sex, and while it was superhot and incredible in all ways, when he pulled out i realized I wasn´t completely clean. He didn´t mention anything, just went into the shower, but from what I gathered there must have been brown stains or some discoloring on the condom we used, I never saw it, I just noticed I wasn´t clean and that there were small stains on my newly washed sheets. I am paranoid and obsessed about keeping all things clean in general, myself, my body, the house at all times, so this is a real personal failure for me. I am so scared he will be put off by me now. I have had anal sex before and I had gone through all the necessary preparations this time, bowel movement before sex. washing myself with soap and water. inserting a finger and even a butt plug before hand to make sure I was clean. And still this happened. And now I just feel like dying basically. I keep telling myself that he should have known there was risk involved, and that if he really cares for me, then an accident like this will not be a deal-breaker. That he should be happy I love anal sex as much as he does, that I am an experimental girl, and that so far we have had an amazing sex-life. However, I am so in love with this guy that the thought of losing him kills me, and thinking that I might have put him off makes me heartbreakingly sad. This was just beyond my control. I just wish I knew he didn´t care about this, but I am too afraid of the answer to ask. Besides, I am sure he would never tell it to my face if he were put off by this, and now I´m so scared the way he will let me know is by not wanting to have sex with me again, or by not calling any more. Please help!