Birth Control Pill Spotting?!

Krista
I've been taking Larin 24 Fe and I've heard that spotting is normal for the first few months.
But how much spotting is too much spotting?
It's been 10 days straight for me with brown spotting and cramps. 😑 If it doesn't lighten up in the next few days, I think I'm going to call my ob/gyn and make an appointment to switch. 
Thoughts?