Implantation bleeding maybe???

I had a small amount of pink discharge when I wiped. Only happened once. I have been having mild cramping/weird twinges for the last 3 or 4 days. Small amount of nausea yesterday morning. I am afraid it is still too early to POAS. I had an HCG trigger 11 days ago and I am around 9DPO. When could I expect accurate results..... Supposed to go in for a beta this Friday but I don't think I can wait until then. I just feel different this month!!! I really hope for a BFP! I will be more disappointed than usual if I get another BFN!!!