I took this test this morning 8dpo/9dpt

I have been testing since day after <a href="https://glowing.com/glow-fertility-program">iui</a> using the cheap pregnancy test strips and got positive results until 2 days ago, I have now had 2 days with no positive results, then this morning I did a first response and got a very faint line

Could this test be really sensitive and still be from the trigger shot or could it be a bfp?

UPDATE

I took a test yesterday and this morning at 11/12 DPO line is definitely getting a lot darker.. Definitely not the trigger shot 😁

Picture left to right 12/11/8dpo