I'm normal right?

Well my period came yesterday, and I was pretty upset. Which I then felt guilty about because there are women out there that have tried for years and years and I just started trying. This will be baby number two for us, our first was a pleasant unplanned surprise. Literally didn't wear protection one night and bam I was pregnant not trying at all. But last month we tried and here is my period. Kind of had me panic, like wait why am I not, I was after one night the last time. Is it normal to starts silently wondering why so soon into trying? Or was my unplanned pregnancy something that just spoiled me into thinking this would be easy.