Very light bleeding/spotting 10 days before period is due. unprotected sex without ejaculation 5 days before the bleeding. what does this mean?

Hard to say: There are a lot of things that can cause irregular bleeding. Most are not harmful or worrisome. Pregnancy always needs to be checked for , but if not pregnant and this continues a visit to gyn and labs & ultrasound can likely give a precise answer as to why this is happening.

It could be : Implantation bleeding. Do a pregnancy test if u miss your period.Best wishes! http://www.Ehow.Com/facts_5121686_midcycle-spotting.Html.