I would recommend that you call your doctor to find out why you might be missing your period, because its almost guaranteed that you are not pregnant. Even if the home pregnancy test couldn't detect anything (which at 11 days past due, they should be able to), if you were pregnant the blood test would definitely have picked up on it. They are VERY accurate about your hormone levels and can detect pregnancy within days of conception. The one thing I would be concerned with now is talking to your doctor to see if some of the medications you are taking might be messing with your cycle. If that's the case, you might want to look into using an extra form of birth control to prevent pregnancy, like taking the pill or the shot and using condoms. If you are trying to get pregnant, then now's the time to talk to your doc about trying other psychatric medications that might be less harmful to a baby or what your options are to take care of yourself if you become pregnant.