Advice please

Melissa
Hi ladies , I'm on day 32 of my cycle ( I'm like click work usually 28-29 days ) period was due on the 6th.. It's now the 8th and no period . A had light spotting a couple days ago ( pinkish brown ) and also light bleeding after sex . Still no AF.. home pregnancy test this morning was a big fat negative 😔 could I be pregnant and my levels are not high enough yet ?