Am I pregnant?

My husband and I have been TTC for about 2 months. I am 15 dpo and I was supposed to start yesterday. 2 days last week I had light pinkish coloring in my discharge but not a lot, I've also had nausea, using the bathroom more often than usual, craving chocolate milk. Quite a few people that I have talked to believe that I am, I've taken a few tests all were negative, does this mean I'm pregnant?