Pregnancy symptoms but negative test?

My positive ovulation test was the 12th of this month. My husband and I did do the deed many times. Since ovulation I've had lower abdomen & lower back cramps, achy legs, nausea without vomiting, decrease in appetite, fatigue, I've even been told that I have a glow! (Tmi sorry) but I've also had thin white discharge. The 18th and 19th I had 1 spot of pink blood show up on my liner and that's it. My breasts are bigger, and hurt (not all the time though. I've taken tests, several first response test had a faint grayish second line that everyone said was a evap so idk I'm so confused. My menstrual isn't due until the 27th.