HCG levels at 5 weeks

Hi all! I've been very nervous with this pregnancy due to losing my first so my GP agreed to test my HCG levels (they don't usually do this in the UK). At 5+2 they are at 12000. She said this was quite high, which I'm hoping is good. I've got another test on Thursday next week to check progression. What were your levels at 5wks? I've read online (silly thing to do) that it could indicate a multiple pregnancy, anyone end up being pregnant with twins with similar levels to this?