i had a protected intercourse last nov. 27, 2010. i had my menstraution last dec 3-11, 2010 & then another cycle last dec 27, 2010 -jan 2, 2011. then i had another last jan. 28-feb 4, 2011. until now i don t have my period & i am really worried. i m 29 years of age & this is the first time that it happened to me. i haven t checked any test....need ur help