Send help

y’all I’m confused. So got my peak opk on Wednesday(first time I tested this cycle coz I only got opks Wednesday so I don’t know if it was positive on Tuesday already) and then Thursday it went negative. Firstly how many DPO does that make me? Then secondly, my nipples are really really sensitive to the touch, like grazing past it hurts, and I have cramping. Feels like very very mild AF cramps. Went to the loo and when I wiped I saw some blood mixed with creamy CM, not much, like really really little. It’s wast bright red it was more light pink. Then I wiped again and it was beige/light brown. However it’s not when I wipe the surface, it’s when I get In there good...I know it’s way too early for implantation bleeding but does mean I’m out ?