TTC Baby #2

Help!

We have been TTC since the end of June and had a chemical early August.

Started back in September. I ovulated(almost positive) the first week of September and we BD on the 1st, 9th, 14th, 22nd, and 23rd.

AF should have started 19th-22nd but never showed. Took a test Monday the 23rd and BFN.

Yesterday (24th) I started spotting only when I used the restroom and barely got any blood on a pantyliner all day. Nothing over night and even less today when I use the restroom.

Could this be AF being weird or implantation bleeding?