late for periods, brown spotting

Since 9dpo, I have brown and pink bloody discharge mixed with mucus. On 17 dpo I have very faint brown spotting. I am late for my periods.... and scared to get BFN as my ovulation was fuzzy, only clear blue detected only and acc to first response I didn't ovulate. Last time when I was pregnant I had no implantation bleeding or discharge (resulted in miscarriage). So scare to take the test, I will be sad to see BFN