Need some help

Paige
I was having a feeling I was pregnant I took two tests and they were both positive so I would be 3 weeks 5 days. I took another and it was negative so I went to a doctor and she said it was negative but it may be too early to tell so she told me to take one in two weeks. I get nauseas through out the day, I've gotten sick, I woke up early this morning having some cramping and I had light spotting and it's still spotting but now it's brown. I had a "period" last week though.