i'm 21 years old and i've been on loestrin 24 fe for 10 months. for the first time, last month, i didnt get my period....at all. i took a pregnancy test and it was negative. the weeks prior to my missed period i'd had a lot of stress and had been traveling, so i feel that is what caused my missed period. my question is, is it alright for me to have sex with my boyfriend again? i continued taking my birth control as i normally would. if we have sex do we need to use a backup method?