9dpo discharge

Thoughts please - 9 dpo today, this morning I had lots of thick yellow mucus which is unusual for me, this afternoon, same again but tinged with pink. Looks very similar to the implantation bleeding I got with baby no1 at 10dpo and tested positive same day. If I'm right and implantation has occurred, when think best time to test? Am I best to wait few days or try tomorrow? Af not due for another 6 days. I don't want to do too early and get disappointed..