I already have two children, and twins run in both my DH and my side of the family. I am having such anxiety and can't sleep well anymore since I'm constantly wondering if I am having twins. I have an u/s at 9 weeks, but want to change it to 6 weeks. Do you think my doc will approve this???
Re: If I am 5 weeks pregnant, but having major anxiety about having twins - should I ask for 6 week u/s?
Unless you have medical reasons to have an early u/s, I doubt your OB will move it up. If they do, be prepared to foot the bill as your insurance may view it as elective.
There's no reason to have betas run unless there is a question about the pregnancy progressing normally in the early stages. That's what betas are for and they cannot be relied on for diagnosing or indicating twins.
I agree with @carseat. You don't need an early ultrasound, you need to chill out.