Spotting at 3weeks since last period??? what's going on??!

Hey girls!!!
Well what I though was maybe an implantion bleed y'day has now turned into spotting. Thing is it's only just gone 3weeks since my last period?? Surely I can't be having another one I'm never a week early!?
I'm so confused - what's going on? Any ideas!!
It's also brown so that's old blood right? Do you think my proper period will come soon?... wondering if it's maybe due to stress on the run up to my wedding?

Thanks in advance girls - Baby Dust to all
xxxxxxx

Hey x x x

Just gona tell you what I think lol!!!
If its brown it is old blood which could be a good thing its your body getting rid of it!! it could be stress we know our bodies can play tricks on us, so maybe give us a few days an see what your body wants to do, maybe you will have a full period or maybe after your bodies rejected all its old blood you may not come on at all!!!!!
good luck hun
take care
love sarah x x x