I’m trying to conceive... 1st try... failed

Hi girls, I would like to know what you guys think. My husband and I were intimate on the day before the ovulation day. We are trying to start a family, but I don’t think I’m pregnant because I already feel like my period is about to come which it should come on Sunday. I feel a litt sad, but I still have faith. It’s our first try btw. Should I be concern and think that I might take me couple of times till get a positive???

Hugs