Tmi post- brown spotting

So I've had a 34 day cycle since January 2013. A couple months have been 36 days but pretty consistent. Today (day 24) about 5 days after ovulation I have brownish spotting. Is this implantation? I know nothing about this. I've heard inplantation bleeding doesn't happen very often. Trying not to be dissapointed with a super early period but not too excited for pregnancy either. Any thoughts or anyone else experience implntation bleeding in past pregnancies?