Spotting

I'm approx 5.5 weeks pregnant and have had 2 days of spotting. Brownish blood, not very much. No cramps. This follows about 15 days of light bleeding when I was unknowingly approx 2.5-4.5 wks. I have PCOS so the 15 days was not unusual at the time other than it was lighter than normal. Should I be worried about the new spotting? I've read that it can be implantation bleeding but have already had 15 days of bleeding...

I'm out in the bush so can't get to a docs till next week. I have an appointment with a GP on Thurs but should I try get in earlier (back to civilisation on Tues).