Was I too late?

Hi ladies so I thought I’d started my fertile week on Saturday. I dtd in Sunday night and tested on a opk which was negative. On Monday morning tested again and it was negative. I took my eye off the ball and didn’t test in the evening. To my amazement yesterday I got a positive opk at 7am. Dh was away at work. I tested again in the evening at 5 and it was negative there were still 2 lines but there wasn’t a smiley. Managed to dtd at 7pm 12 hours after the positive. I tested again this morning and it’s negative. I’m soo annoyed that I’ve missed it. Was I too late? My breasts are sore now which usually means I’ve ovulated. Ttc is just too stressful l. Especially when you have had 2 losses and have been trying for 10months.