This is my first month opk’ing and I’m getting a bit confused. My first positive wasn’t until yesterday but I had no symptoms yesterday. By last night it was showing negative again. This morning it’s positive again though and I feel mild period like cramps.

How long do tests normally stay positive for though? Over 24 hours??

Do you think I’m ovulating today or not yet given test is still positive...,,do you ovulate after first positive reading or once it goes negative??? I’m just worried as I’m now cd18 and only have a 28 day cycle.....it’s so late already I feel!!!