beta #2 was yesterday and was 478. "a little off" per my nurse. hcg levels are supposed to double every 48-72 hours, and mine are doubling at a rate of 79 hours. some lovely ladies from my IVF board suggested that maybe it's what's called a "disappearing twin", meaning another embryo (or two) were still present but hadn't fully attached to my uterus and was not viable. the presence of the embryo could have raised the initial level, therefore making the 2nd number not look like it doubled correctly.
anyways, i go back tomorrow for beta #3 and early ultrasound is scheduled for monday. definitely staying positive and feeling pregnant! i've definitely had symptoms for the last week or so. cramps, constipation, sore boobs, big boobs, etc. no nausea yet, thankfully!