I had my last period on January 6th and ended about 5 days later it was normal, then about 5 days after that I started spotting and I was having unprotected sex 3 times before this happened... what does it mean? And I took a pregnancy test and it was positive then the next day I took another one and it was negative what does it mean?

If I were you, I would do two things. I would go get a blood test done, and get an exam done by my ob/gyn. Its more likely to get a false negative, then to get a false possitive. But since you have one of each, its probably something you want to talk to your doctor about.