ok, I know this probably gets asked all the time but I am 18dpo and no period and a BFN on every test I pee on, I am having sore tender breast, increased appetite, and frequent urination....also back pain just on the right side, I also get light headed or dizzy at times....my question is, could I still be pregnant? Me and DH have been trying for 15 months now and still no success....plz let me know if anyone has had this problem and was still pregnant???