Help?

So I got a very faint positive yesterday. Came up at around the 3/4 minute mark and had colour in it. I took it in the afternoon with around a 3 hour wee hold.

I completely forgot to test with fmu, was out all day today and then after when I got home at around 1/2 I done another test (frer) and it was negative... baring in mine I’d only had a wee about an hour before hand. Has this happened before to anyone else?

I’ll attach yesterday’s faint pos. advice please :)