Good morning I new to this. My hubby and are TTC. This is my first month. I have been tracking my O day by calendar. On Thursday I took a First Response opk and this is what it looked like. According my my calendar my O day was this Saturday. Unfortunately I was unable to test Friday-Sunday due to vacation. Today, Monday, I have had some cramping. Could I had O'd late, are they O cramps? Should I take a Clear Blue ovualtion digi?