After my beta increasing from 1068 on Wed to 2727 on Thurs, my RE wanted me to come in today for another beta and an u/s. I guess 1) he wanted to see if there were multiples, and 2) he thought I might have been further along? Either way, my beta today was 9030 and we only saw one sac that measured just shy of 5 weeks. So it looks like I really did O on the 26th. Since it was so early we didn't get to see anything inside the sac. We go back next Wed for a follow up. There is a slight chance that I might be having identical twins because of the high beta, but more likely it's just one little bean and I just have a high beta for him/her. Either way, we're happy!