OH MY GOD! This is happening to me as well, i mean exactly. I'm a week and 5 days late for my period and i have had lots & lots of white, creamy discharge for about 2 weeks or more. For the past 2 days the amount has got a little less - but an increase in discharge, especially white and creamy discharge is a very well-known pregnancy sign! When you're not pregnant you normall go very dry after ovulation and stay that way until your period arrives. I also had the sore nipples (again, just the nipples, especially when i squose them or pushed them in). This has gone off now though, it lasted for about 5 days, but for the past two days they're only slightly sore.
I can't believe i've found someone with the exact same symptoms!!
I took my last test 6 days ago and i'm just going to wait until monday before i take another.
It does sound quite promising for you though! I wouldn't automatically assume your not pregnant just because you got that negative. I work in a doctors surgery and there are so many women who still test neg for quite a few days after a missed period and yet it eventually comes out that they are pregnant! Everyone is different.
Now, when you test again, try and use a test that detects the pregnancy hormone (hCG) at a low level. You need one that detects at 10m/iu or 15m/iu - any higher and it's more likely to give a false negative (and even some of the expensive ones only detect at 25m/iu)! Also use first morning urine. If you still test negative then just wait a few more days and test again. You know, when pregnant, a womans hCG levels double every 48 hours, so it's good to wait a few days before testing again. You prob know all of this anyway, but i added it just incase! All i can say is just keep testing until you either get that BFP or your period.
Good Luck! And I will definitely be interested to see how it all turns out for you! If you want to talk then feel free to email me!