7dpo and waiting

Christina

So I had cramping on 4dpo, 5dpo,& 6dpo which is odd for three whole days. Brown spotting for for the past 3 days.. I don't usually do that. If I get my period it's red and it's immediate.! I'm not due for my period until 9/7.. Today I'm 7DPO no cramps but feeling impatient because I read they could possibly be from implantation. Impatience got me and I took a test BFN...Anyone with experience on this?