I really need to know if I could still be pregnant?

im pretty much in the same predicament as you although im not quite as late. the hcg hormones could not be being picked up by an at home pregnancy test if you are. i would recommend seeing a doctor for a blood test if your period doesnt show or a positive test doesnt come up. my cousin didnt find out she was pregnant until she was 10 weeks along. it just all depends on your body i guess.