19 dpo neg test

Hi, my period should've started on 1/8/13. I've now taken 5 tests all negative. I've had so many symptoms over the last 2-3 weeks that I feel like I am pregnant but all of these negative tests make me feel crazy. I'm having lots of clear discharge, I'm exhausted, pinching and milk cramps, my nipples hurt so bad, my sense of smell seems increased, I'm so horny too-- 
​I guess what I'm asking is has anyone gotten a positive after 19dpo and if so what were your symptoms???