Needing Insight

Hi ladies, I’m just curious as to whether anyone has experienced this. I ovulated on cycle day 13 (January 19th) I know this for a fact. I continued to test with opk strips for the hell of it. From cycle day 19 to 23 I kept getting really high negatives (the negative right behind the positive) and now I’ve been getting positive opks since cycle day 24 and the line keeps getting darker. I use Glow and Premom to interpret my opk strips. They both had my initial ovulation day as Jan. 18/19th but changed once I started getting positive opks again. I’m aware that some women can surge twice and that there’s always a traceable amount of LH in your system, but I don’t think the test line would continue to get darker with the days if it was either of those things. Any insight would be appreciated.