Awww.
It's not stupid, and it's perfectly normal and understandable.
When we went through all the infertility stuff, they couldn't find a reason why we couldn't get pregnant. I mean I had a known issue that CAN make it more difficult to get pregnant, or maintain a pregnancy, but lots of women get pregnant even with that, so they didn't think that was the issue. We went through all kinds of unbelievable, sometimes painful, almost always embarrassing tests. And nothing in the tests indicated a problem with either one of us.
I think back on all that and wonder at it all. People really do break up over the stress of infertility, and it's no wonder. The hardest part was not knowing WHY. And every month hoping, and then when the "." started, crying my eyes out. There were a couple times I felt off, and I thought maybe... but no. And a couple times when I got no "." (and I was regular, like a clock!), but the doc checked me out and said sometimes we just have a missed cycle, no egg released, no "." Soooo frustrating!