I know you've already received a lot of re assurance, however I to had spotting (bright red) about a week or so before my first scan, I initially thought that's it I'm MCing. My OH and I went to A&E straight away where they did an internal, and when the doctor pulled out the speculum so much blood came out I was sure it was all over. I was booked in for a scan the next day and sure enough there was our little bean, as happy and safe as can be and now 26 weeks later he/she still is there even with a couple of scares in bewteen, so you never know. Just keep your fingers (and legs) crossed, and if for any reason you are worried GO TO THE HOSPITAL, there is nothing worse than not knowing.