Period?

Looking for some information or someone who has similar experience.

I’m currently ttc and my last period was October 2nd, had a chemical pregnancy that cycle. Just getting off the iud at the end of July so my past 2 cycles have been 34-38 days. Well I wasn’t tracking my ovulation or anything this month so I do not know when I ovulated but my app said October 24 and period was due yesterday. I took a first response pregnancy test Wednesday morning and I seen a very very faint line. Well also I hav me been experiencing very very light spotting since Saturday on and off. It’s brown and mostly just when I wipe. I use liners but nothing much at all gets on them. I just feel so confused about this. Unsure if this is my period or implantation. But I know implantation doesn’t last this long and I have never ever in my life experienced a period that was this light. I’m waiting a day or two to take another test. The picture is of the test I took Wednesday morning. Also I’m still currently getting the brown after I use the bathroom when I wipe.