With my 1st I wasn't sure of my dates so they my gp gave me a referral for a dating scan, and I didn't have to pay. I was told if it was your first scan and being used for dating that there was no gap. Go to a different gp and say "I'm pregnant but don't know my dates" and see what happens! I went public the first time and my hospital (WCH) didn't see me till 16 weeks either, so I was really glad my gp had the scan and bloods done for my reassurance. This time I'm going private and my OB ordered everything for week 12.