Weird question.. But is there a way I can tell if this 6 month old FRER was a real positive or a false-positive?

This test was from 6 months ago. And I got my period the very next day. But I could only take this one pregnancy test because it was the only one I had and I was out somewhere remote with no pharmacies.

Now, 6 months later I find myself still looking at this test and wishing I could go back in time and test more just so I could know if this was real, or just a false-positive.

I'm still TTCing at Cycle #12 now with unexplained infertility, and I just wish I had answers.. 😔

So is there a way to tell whether this old test is a real positive or a false positive? It seems much darker now than I remember it being when it first happened