Hi. I havent been feeling 100% lately and i feel as if i could be pregnant. I was on the depo shot for 2 years and i missed my apt to renew it on May 2013 as a result i began getting my periods again. Oct 21st was my last period i had intercourse on the 27th , the week after i felt experiensing these syptoms(fatigue,nausea,back pain,headche, ect). I took a pregnancy test on the Nov 3rd and it came out positive took another one on Tuesday Nov 11 and it came positive (1 line visible quickly and than 10 minutes later another) i went to a clinic they did a pee test and the HCG came back negative. I havent missed my period i am supposed to get my period on the 14. what could this mean.

EG