Brown Spotting

Has anyone experienced multiple instances of brown spotting? I had it at 8 weeks and again at 10 weeks. Doctor said it was fine, as I had no other symptoms and it stopped within a few days. I'm 14 weeks and 1 day now, and have had brown spotting again for almost 4 days. I don't have any other symptoms and nothing feels funky. Just wondering if anyone out there is experiencing something similar?