I need a little help here?

Can somebody please help me out here? Give me your opinion...do you think im pregnant from these symptoms? And if I am...why are all my tests coming up negetive? My period was due wedsday (2 days ago) Ive NEVER been late in my life, and i am in no way stressed out. I had spotting last sunday, pink and at one point a brownish color...ive never spotted and i am not on birth control. Ive been really tired, eating alot, very moody. My discharge was a milky color. I got shingles, (i dont no if that matters, but i read somewhere that another women did to, and i have not been around anyone that could have exposed it to me that i know of) ive been really emotional, having wierd cramps in my uterus. the baby would have been concieved last monday (11 days ago) and i heard that you wont get your positive till 2 weeks after conception. Im trying to get pregnant and this is driving me crazy as to why i wont get my positive. lemme no what you think, thanks