Why ? Why does my body have to do this!

Ugh!! Just venting here about how MAD my Body makes me! My periods have always been regular 31 days then last month for some odd reason it was a week late! We used first response OPks, successfully, so I was so excited! I was like yes! There's no way my period just happens to be a week late the month we used OPks, I really thought it was my month, well needless to say I was wrong got my period the day I was going to test, :(. A week and one day late😖 so here I am again next month, with my period supposed to be here 2 days ago, I'm on cycle day 33 and very frustrated I just want her to get here. I'm not going to get all excited, I won't let my self, I always get let down. My fiancé and I have been trying for a family ever since May when I got off birth control, and now that his mom moved to California to live with his brother to take care of her health and her leaving us the house I just know it's the right time! I just wish my periods would get back to normal. I'm not under any kind of stress, I'm actually more happy then ever, getting the house, my fiances new job, and getting married in 4 months, I don't exercise anymore then usual, my weight is the same. I just don't get it, All we want is a baby, but my body is so annoying! Sorry just venting :(