Help! First month TTC and using OPKs

According to Glow I ovulated on 9/27. I bought an ovulation kit this month and tested starting 9/23 because another app I use said ovulation was 9/24. All came back negative until 9/26(2pm) was positive. I tested again 9/27(7:30pm) but the line wasn’t as strong. I took another test on 9/28 and looked about the same as 9/27. Then because I had strips left over I tested again 9/29(9:25am) first morning urine) and got a positive and 10/1(8:45am) first morning urine and the line is still darker than I would have expected. Sorry it’s so long I’m just confused because I thought the LH surge wasn’t supposed to last that long.. not sure if I’m the problem and my testing times just need to be more consistent? I also read that some women get positives even after ovulation when they’re pregnant? BD 9/23,9/26-27,9/30.

Sorry for the long post! Thanks for any input!😊