Light brown spotting in second trimester: ER worthy?

Hi, ladies. I’m 16w3d and I’ve had spotting come and go since yesterday at 3:30am. I’ve had some cramping along with it but nothing that seems to worry my OB enough to ask I come in ASAP. However, she wants me seen no more than three days after it had started to make sure everything is okay with baby.

I have an appointment on Wednesday but she said if it didn’t stop completely she doesn’t want me to wait. However I tried getting ahold of my assistant director who does scheduling and she hasn’t responded to me as to if I could get coverage for tomorrow to go in.

Essentially the question would be, would you go to the ER and follow up with your OB/midwife on the scheduled appointment day? Or would you just wait until Wednesday to talk to the midwife you’re scheduled with? I would hate going in for a non-emergency, since that’s what the ER is for, but the longer it goes on the more worried I am. I’ve been strictly resting and keeping up on water so I was hoping it’d be gone by now.