Opk !!!

Casey • I`m 30 and my husband is 29. I have a 12 yr old son and he has a 9 yr old daughter, we have a 5 yr old daughter together. We have been ttc since Oct 2013
I think this morning was my surge. What do you think. I thought it was on the 20th but today looks the darkest. I wonder why? I'll test again in a few hours.