you could... it is called implantation bleeding and as it doesn't happen in every pregnancy it is common... take a test again and if its negative again contact your md and have blood drawn... and if its still negative just wait your missed pills probably made your period irregular and it will take it some time to get back to normal... gd luck
I did have sex on my last pack when i missed like 6 pills. and my period never came but my doctor said when im due to start my next pack of pills to take them anyways so i have been. i havent had sex on this pack but i missed a few days and had that very light brown spotting. i was just wondering if this means im not pregnant? i know you can spot or bleed if you miss pills, but would u spot of bleed if you were pregnant (and missed pills)?
you said ur not having sex? well when was hte last time you did?? if it was less than a week before you missed your pills then you could be pregnant and the dark brown bleeding could be old blood that ur body is getting rid of... but since you did miss 4 pills it is also normal that your period becomes irregular... so i would get a check up just in case...