Ovulation so quickly?

Serenity

Hi ladies, earlier I made a post about my LH test which was positive or very very close to being positive (first pic). That was like around maybe like 3-4 hours ago. I just retested with same brand and got a wayyy lighter line this time around.. What does this exactly mean ladies? I had sex right after I got the first LH test result. Is this my body saying I’ve ovulated already at this point or is it normal for it to decrease like that before ovulating?