Spotting and cramping!

So I'm about 6 weeks pregnant now, had on and off spotting for a couple weeks, sometimes a light pink sometimes a light browny colour. I'm thinking this is normal? Just wondering how many other mamma's have this too and how long it has lasted them? I seem to be having cramps all over, sometimes just in my back, sometimes low in the middle of my pelvis or it feels on my pubic bone sometimes, and then across my hips. Does this sound normal to everyone? I'm having an early scan tomorrow morning, but just wanted everyone's take on how I'm feeling!