Hi I m almost 19 i have been sexually active with my boyfriend for over a year and a half and had my period on august 3 for 4 days witch is normal for me. me and my boyfriend usually use the pull out method but didn t do the pull out method around the 14th the 17th and 19th i have had a yellowish tinted discharge sometimes with brown and red string like blood in it but not enough to go on my underware just noticable when i wipe... should i be concerned what could this be