So I've been doing opks when I get home from work around 4. I was getting clear negatives. I was having sharp pains in my left side near ovaries for the past 3 days. I tested this morning around 7am and got strong positive with my cheap tests, which aren't supposed to be first morning urine, but I double checked with my clear blue which is supposed to be fmu and it was a solid smiley so peak. I'm on cd16.