Late period

So about a month ago I was on vacation, during that time I had a yeast infection, it got better during my period and when I came back from vacation the infection came back and I had to get treated for it. It all went away until now when I'm supposed to be on my period but I'm a couple days late. I've heard vigorous exercising could cause it and I did do a few hard work outside before I was supposed to start. I also have been stressing maybe a little more than usual and I'm also kind of bloated.... I don't know what all this means I just would like some advice before going to the doctor, by the way I also have not had sex recently