Pink/brown spotting 18 weeks

I called my doctor and she said it could be normal but if I want to go to the ER and checked out then I can. I do have an anatomy scan tomorrow though and wonder if I should just wait for that. I’m usually a “Let’s immediately go to the hospital” person for everything but because of the scan already scheduled tomorrow I’m just torn on what to do. Any advice? I know it’s just brown/pink blood but after my miscarriage at 7 weeks that started out looking like that I’m just terrified.