Concerned...

Amber

I'll be 18 weeks in 2 days. I've had kind of an aggravating week especially last night. Around 6:30 in the morning I woke up to use the bathroom and seen that I was lightly bleeding. I've tried to call my doctor to ask about what to do or if I should be worried but he was busy all day. Through out the day I'm still getting some blood spots but now the color of the blood is darker. Can anyone tell me if this is normal or if it's happened to them because I'm currently freaking out. I'm a first time mom and I don't know what to expect.