A little pregnancy advice plz?

Ok, so mid-cycle I started to have some dark brown blood and it lasted a week, not super heavy like a period but enough for a panty liner sometimes. I am now 6 days late for my period and I took an early detection ept hpt which came out negative. My bbs are tender, and I caught myself eating pickles and fruit at midnight last night..lol..do you think its possible I could be pregnant? Perhaps maybe I ovulated late or something? Any answers would be appreciated and btw, yes my periods are like clockwork. Thanks in advance. :)