Me n ma bf hav been having unprotected sex for 2 months already.n da only method we've been using is "pull out".da thing is Im always hoping he didnt kum inside me;so I got my "period" but it was only thin blood.n not as much as usual.it lasted about 4 days(small amount of blood) and about a week n ahalf after,I got my period again.!im very concerned.da only thing I kud think of is dat prolly I had a miscarriage(which I had once before) n period afterwords :/ please help