Is this a sign of pregnancy?

My boyfriend and i has been on and off with protection and we have sex quite a lot. we are aware that we aren’t using protection as much as we’d want to. but i am 3 days late for my period. I have been experiencing really sore breasts and light cramping. my breast are huge, way unusual then the times i get my period. Just 7 hours ago, i had taken a pregnancy test and it said negative. Few hours later, I went to go pee, I saw a pink light blood on my underwear (shown on picture) so i am really really confused. I am now bleeding light pink & brown & it’s very light. Am i pregnant? Was i too early to take a pregnancy test and should i test again next week or even in a few days. Help please.