Bad OBGYN?!

So I’m currently 28 weeks along. When I woke up yesterday morning from a night of pain in my stomach and back, I found blood!! I went to my OB and she hardly made the time for me! I understand that she was busy but I’m a first time mommy, and I was petrified. She wouldn’t even explain to me as to why it was happening. What would you guys do? Change OB? Even tho your so close to the due date? I don’t know what to do guys. This is not the first time I’ve felt this way. 😕