Brown spotting 7 weeks pregnant

So I will be 7 weeks tomorrow, and last night I had a very light pink spotting and then it stopped, and then today about mid day I started having a little bit of brown spotting. I called the doctor and she said it is ok if it is brown but I need to monitor to see if it turns red, and if it does I should call back Monday. Is anyone else experiencing this? It's my first pregnancy so I am very freaked out!