We found out at 7w3d. My betas were normal, so didn't think anything of those. However, we a family friend doing tarot card readings back in Jan for fun. She said we'd be preggo in Sept with twin girls. She was right about the Sept, so we'd been joking around about the twins being true too. My pants were already getting too tight at 5 weeks, even the rubber band around the button was uncomfortable quickly. So, I thought there might be a chance. We were still surprised though lol I can't believe some people don't find out until they are almost half way through their pregnancies...I'm already so huge, I think we'd have known by now even without ultrasound. I look like I'm 6 months preggo already!