Implantation bleeding or chemical?

Nevada

***UPDATE*** since the initial spotting there has only been minimal bleeding and it has been darker brown. It has basically disappeared, at this point. I tried a different kind of test this morning and it does have a vvfl so I am going to buy another first response (this time in red be a I accidentally got blue, yesterday) and I’ll take it tomorrow. The cheapie strips I got this time I didn’t realize were different from the ones I’ve always gotten and at this point believe they may be faulty because one of the “positives” I got the other day has color on one side of the line but not the other and I’ve never seen that.

Is there a way to tell if this may be implantation bleeding or a chemical? (ETA that this was after sitting for a few minutes to let it build up. The first time I wiped there was barely anything.) I had an early miscarriage May 18 and ovulated on May 31st. I am now 10dpo. I thought I saw a faint line yesterday morning (9dpo) with a little pink to it and can see a little bit of a shadow on my test from 8dpo, but now can’t see anything on this mornings test so idk if it was line eyes, the test was messed up and I need to go ahead and test again tomorrow or if this has me counted out.

40 minutes later this is all there has been since the first picture.