LynsDan, when I was pg with DS2 I had spotting/light bleeding on and off over 2-3 weeks. I didn't know at the time I was pg - I thought I was about to get AF back after having DS1. I found out I was pg just after 6w - and I still had some spotting for the next 3-4 weeks. Only mild, but a bit unsettling. Anyway - just wanted to let you know that we had a good outcome and I truly hope you have a sticky bub and a good outcome too. I recall feeling a bit crampy early on when pg with DS1 (not DS2), so I think that's not uncommon either.
All the best, xx