Anyone ???

Lexi
So today I woke up and went to the restroom. And notice that I have light light pick bleeding .. It wasn't heavy at all .. Then a  hour later I returned and it turned brown and then went away .. I've been having tender nipples . I've been tired and been having slight cramping and back pain .. 
I took a home test 2 days ago and it came out negative but than this happened today . Maybe I tested to early ? Can anyone help me ? Is there a chance