Help?? Had anyone used these before

Jennifer • Been ttc #1 for 4 years my fiancé is 32 and I`m 32 will be going for IUI soon 😊
I know it's negative. But has anyone used these hpts? What was the outcome and dpo if u got your bfp. I'm 12dpo af is due in 4days been having little spots if brown since 10dpo or 11dpo😊