I had pink spotting more than a couple of times between weeks 5 and 7. I had an ultrasound at 7.5 weeks, saw a healthy embryo, good heartbeat, measuring right on track. I'm now at 11 weeks and everything seems to be fine. I think it's pretty common to have some spotting early on, especially after sex, a strenuous bowel movement, etc. It is, of course, very worrying when it's happening, but there are lots of non-serious reasons why it might happen!
SAH dissertating mama to my sweet little boy (2/2009)and his baby brother (7/2011)