Brown discharge...then light pink/bright red spotting

Jessica

Please help Glow fam!!

I’m supposed to have AF in 4 days, but this morning I woke up with slight cramping and light brown discharge. My SO and I had intercourse and then I had bright pink/light red spotting. Not enough to fill a pad, but just when I wipe/a little on panty liner.

Could this be implantation bleeding or just AF visiting earlier than normal??