Positive OPK at 13 DPO?

I’m pretty much grasping at straws TBH but here we go.

So I’m either 13-14 DPO today and I got a BFN again this morning. Yesterday though I was out of HPTs so I used an opk and it was a full positive on the opk. I also got a positive opk two weeks ago on the 16th so I’m really confused.

I’ve heard that you can get an Lh surge before AF so it’s probably that but I’ve also heard crazy stories about a positive opk can mean you’re pregnant.

AF is due tomorrow. But I’m hoping it won’t show. Has this happened to anyone else?