bfp then I get a negitive..

hi ladies.. I posted my pics on here a few days ago and everyone saw my faint pink lines.. so I was super excited and went to Target last night for a digital test just to see 'pregnant.' so I took it this morning and it said not pregnant. literally all my other 9 tests had pink lines within the time frame. my question is.. do the digital tests need more hcg to read? My test was a First Response digital. I have 1 more test and am going to take it on the 31st.

Help 😩