Wondfo and fmu

C
Have any of you used Wondfo's or other cheapies with fmu and had accurate results? I Usually test at 2&8pm but feel like I still may miss my window, my lines haven't gotten any darker but I've had ewcm for 2 days and some cramping tonight. I think the eagle is hatching lol... Debating testing in the morning when I get up...any thoughts?