Need help please

I'm so confused. Yesterday I took multiple cheap test. They came back extremely faint but there. Well I took one just now with fmu it's negative like 100% negative. I'm 12dpo so a line should be there. Heres my test from last night couldn't get one of the negative in one please tell me I'm not crazy. Has this happened to anyone else. I'm really thinking chemical pregnancy but I'm not sure now.