TTC 3rd baby. Help please!

My fertile window was March 12-22, ovulating day on the 21st.

I am supposed to start my period on Saturday.

This morning I went pee and when I wiped there was really faint pink on my tp. I wiped twice and it was on there both times and hasn’t been on there since.

I got 2 $.88 test (I read somewhere on here they work really well, the pink is better) but it was a BFN. I’m going to test again in the morning.

Has anybody had the pink after they went pee? Idk if it’s implantation, I’ve never paid attention to it with my other two babes. I also don’t wanna get my hopes up. 😌