Hi just looking for some advice.

I had my 2nd scan on Sunday just gone where they confirmed I was pregnant with twins but they were measuring 2 weeks earlier than I thought I was (I thought 8 weeks according to LMP date - they're measuring 6 weeks) can anyone give me any insight please?

I'm so lost to why they would be measuring 2 weeks less then what I thought I was when my cycles are 28 days in length and the last period I got before I found out I was pregnant was 10.05.15. Could it be that twins measure smaller?

I don't go for another scan until the 20th so I'm just a bit nervous with the wait and worried that they're heart rates were 100bpm and the lady who did my scan said if they were 8 weeks the should be about 120-180bpm.

Thanks for any information or advice you can offer.