Why is this so hard?

Okay back story...

Me and my fiance ttc for 7 months before I got pregnant with our little baby (would have been our first baby for both of us)... I did everything right... I calmed down on exercising and only did light stuff, I took my prenatals, cut back on coffee and ate healthy things when I got hungry and yet still that wasnt enough and miscarried at 5w5d...

In those cycles of ttc I used opks, checked cervical positions, checked cervical mucus, did everything but temping...

We are back at cycle 4 again this month of ttc after our loss and I just dont know how to cope with this... Last month I did everything I took opks, I took pregnacare for conceiving and even used a soap that doesn't affect the pH in your vagina and still AF showed up... We even baby danced the day I got a positive opk and AF showed up 2 days earlier and stayed a day later...

Why cant we get this right and if we get it right why cant we get it right to keep our baby😕