Bleeding and freaking out.

I woke up this morning to bleeding. It definitely wasnt heavy, but I am spotting lightly still. I called the ob oncall and she said because I am only 15 weeks and there is nothing they could do for the baby at this point that I should only call back if the bleeding becomes heavy and period like. It just feels like a cold response and I dont know what to do now. Should I call the office when they open and ask for a check to make sure everything is okay? I'm really nervous and anxious right now.