2 days late!

I'm 2 days late. My LMC was 2/2-7th. I took a cheapie on Wednesday when AF was due and got a BFN. Today I'm spitting lightly. Brown spot on my linnet and a smudge when I wipe. Do you think I maybe just ovulated late and I should try testing again? I figured if I didn't get AF today I will test wo FMU tomorrow morning. Any advice? I'm going crazy here.