Where did we go wrong?

I'm 32 and desperate for a baby. I tracked everything and did everything properly this month. Temping, ovulation testing, dtd every day of fertile week!! Even layed with back on the floor afterwards with legs and bum up over the bed for 30 mins each time!!  I thought I was pregnant due to a lot of symptom spotting during the 2ww but bloody AF came today. I'm soooooo upset. Smack bang on time, not even a day late! What did I do wrong?