Hi Jo,
I'm 10dpo today and had similar cramps/stitch like feeling since O'day. It started with minor twinges on the left side, moved around a bit, then peaked on day 8 & 9 dpo and now they are gone! I was hoping at the time they were pg signs (I'm still hoping) so I'll let you know how it goes!!
Good luck! I hope you get your BFP!