concerns about doctors advice

Allie
I've been experiencing tailbone pain for the last month or so (I'm 21 weeks currently). It hurts in most sitting positions, but when I read online how normal it was I was not worried. However, my doctor told me this was not normal and that I should have it looked at by my primary caregiver. I'm confused on what to do when I see that so many women are experiencing the same thing but she says it's not normal. Any advice on how to handle this situation would be so appreciated. I'm stumped at how my doctor can say something that seems so prevalent is not a normal sign of pregnancy.