Hmmm you might well need an early scan to find out. My friend wasn't sure when her last period was, so the midwife arranged a scan for 8 weeks. Trouble is in alot of areas you don't see a midwife til 8 to 10 weeks, you dont know when you are 8-10 weeks. I would see your gp and explain the situation, your gp can arrange a scan if need be. If you can't get an early scan, would you consider a private scan? I went for an early scan privately, just cos I wanted to, and the couple infront of me had a scan as she wasn't sure of her dates, plus she already had a bump, but was only 6 weeks. So she went private to find out.