Implantation bleeding but negative PT

hi, this month for me is so weird, i have no boob tenderness at all which is usually felt 2 weeks before my period, only mild cramps from time to time until now.. my period supposed to on june 6, and im 5days delayed. last june 4 there was a brownish discharge only when i wiped which i thought my period came early and it last for 2 days only then stop (and i thought it was Implantation bleeding). my pelvic also in pain, i had headache colds and cough after 2 days of having brownish discharge, and i had a feeling that im pregnant. so i try to take a PT today (5 days delayed), but negative.. im so worried, my husband and i TTC since last year.. what should i do? do i need to wait til next week to get BFP? thanks for the advice..