When exactly should I go to the doctor?

I got my positive last night. I am kinda wanting to wait a bit to go to the doctor. I have had 2 miscarriages before and I am terrified. I lost my baby girl last year at 23 weeks. And I had lost a baby shortly after finding out. I'm not telling family or anyone besides my fiance because I don't want them thinking I'm not doing the right things. I'm just scared and nervous.