ladylel don't be hard on yourself. it's bad enough being pregnant, and then when there is a whiff of a problem, it's way worse. Is the plan to get the twins as far along as possible?
I'm loving OBEM too. It's made me want an epidural this time round. I've had two large babies with no pain relief - i want one of those injections in my spine please!!
I think stretch marks are a luck of the draw thing. I have never had them. I don't say this with any smugness, given the wealth of other problems I suffer (I write this in the knowledge my prolapse seems to be worsening). 
Baby hiccuped last night - all night it felt. First time I've felt this one hiccup. It's truly odd. My last pair hiccuped the entire pregnancy, so it was reassuring almost this one has decided to do so now too...