Any thoughts on this..?

So, my last period was the first period I had since my miscarriage. It was September 13-16. So about 4 weeks ago. This app says my period is due Sunday. However, I started spotting last Wednesday (the 4th) thinking it was implantation bleeding until it got a little heavier. Not like a period but still...I just assumed it was a weird week early period. I took this test yesterday just to see and it’s super faint? Maybe that

actually was implantation? Does anyone see the line?