Is this okay?

I’ve been testing out my trigger and it seems to have disappeared around 9 DPT. Now 13 DPT I got a vfl and 14 DPT it seems to be getting darker on the cheap strips. On the first response it’s just a bit darker but barely noticeable. By now with my last pregnancy I remember it was much darker at this. I know it can be different implantation time but does this look okay?? Im worried about chemical :(