Health log

I feel that the health long should ask more questions when you have sex, because I documented having sex without a condom and it told me within a few days that I had an 11% chance of being pregnant but I know for a fact that I wasn't because none of his "stuff" went inside. And when I saw this at first it scared me and I was stressed out for a few days. Then I got my period was confused sat down and thought about it and then realize. Does anybody else have that problem or is it just me?