Thanks everone for the support. I was so upset last night.

Had a tiny bit more today, but it's only small. I rang the EPU today as well and they said if I was worried I could go to the GP and get refered up there, or if I was really worried go to A&E.

Implantation bleeding sounds like the most likely cause, and to look on the positive side it means the baby is latching onto me, which is after all a good thing so I shouldn't worry.

Well I wouldn't worry too much hun, that happened to me when I was in my early weeks as well. And also after BD'ing.. sorry if TMI.
The warning signs are pain associated with bleeding, bright red blood enough to fill a large pad in an hour, and that's all I can think of right now. xx