Faint Lh surge few days before AF due?

Waiting
So this is new to me. I am almost due for AF this weekend and I just took OPK test which still shows faint LH surge. I m scared to face the BFN on pregnancy test. I don't feel any symptoms except for AF coming soon. Did this happen to any of u? What does this meAn? I have pretty regular cycle 28-30days