It's very common, and also very common to be worried anyway. As a side note, when I was pg I had no problem being "that" patient and calling back when I felt I needed immediate advice and hadn't heard back within a couple hours. ({)
Every single person I know spotted (even significantly) while pregnant. I know you wont feel better until you talk to a professional (WHAT?! Dr. imoan isn't good enough for ya?!), but I'm sure you're fine.
I spotted like the entire first month. I also had bright red bleeding the second month. I have a healthy little girl sleeping in the next room. I'm sure it'll be just fine.