Any advice is so appreciated

Have been testing since 10 DPO saw a vvvvfl then kept testing each morning and thought it was getting darker now this morning it’s barely there? I took a few other ones but those need a higher HCG so they never worked the past few days anyway since I’m testing early, I’m not really sure what to do now? Would a blood test be any different? I know waiting lol but any input would be great as I was starting to think this month we finally were (bbt still high as well) period due within the next few days