Advice please ladies helllppppp so confused

2 weeks ago I had my first positive ovulation test, after testing twice a day in the morning a light blue line and later in the day darker me and my partner had sex, the next day I tested again and it was fainter than the day before so I tested again later that day and agin lighter and then the next day I tested again and no lines at all, I’m so confused 🤔

The last 4 days I’ve been having cramps and slight pains almost like period but not quite the same, it’s not extremely painful or anything but still aches

I’m just really confused has this happened to anyone else???? Please help