I have had two triplet pg's. One that resulted in my second dd (could see other two sacs till 20 weeks) and an FET that started with 3 sacs, went to 2 and ended at 11.5 weeks.
Honestly, I hate to see any embryos not get life. I would be overjoyed with twins. Yes, it would be tough, but I know that it would all work out.
I am so excited for you. It won't be long.