Flake positive??

I took a $1 store test just cause I had one in a drawer and I been nauseous all day and still no af today is 2 days late but sometimes I'm 2 or 3 days late never past that though. But anyway I took it and it looked like that faintest line but it looked like it could have been negative st the time. So I said well imm just say negative. So a few more minutes pass AND IT GETD DARKER! I MEAN TO WERE I CAN SEE IT AND I WAS LIKE OMG!!! WTF!! I TOOK PICTURES!! It dont look as dark on the picture but I u can see it. But now it looks negative again🤦🏽‍♀️ so idk what happened. I feel like my period could start then it feels like it's not idk.

If u look u can see 2 lines. It did look WAY darker in person. Idk why it looks lighter on here.

Now I dont really see it🤷🏽‍♀️🤷🏽‍♀️ Imma retest Thursday if af doesnt come but I'm thinking it's a bad test maybe. I took 3 of the same test last month and never got 2 lines at all. I dont really think I'm pregnant. But the question is has this happened to anyone else b4 and they still were pregnant