dreamfeederi hadn't heard that, but having just googled, it would appear to be true, 1 in 89 births are twins, but you are 9 times more likely to have twins if conceive whilst breastfeeding...so 10.11% chance of twins if breastfeeding!!! and if what i've just read is true, 40% more likely if taking folic acid, and also more likely if BMI over 30, if aged 35+, and if eat dairy....
so that's 5 ticks for me so i reckon i am due some twins myself if only i can start to ovulate!!!
the only things that increase your chances that i don't tick the boxes for is being tall, eating yams and having twins in the family or having had twins myself already!
oh and it also mentions clomid, but not sure who gets to take that/why, presume you can't just ask for it if you want twins lol.
oh and please try not to worry about your twins, i know lots of people with perfectly healthy twins, and there was a woman who had twins who was on my CS ward in hospital. She had to have a CS due to their positions, and it was done at 35 weeks, both good weights, and they were let out after 2 days, whereas we were stuck in for 5 days!!!
Just try to take things as easy as you can, and nag DH for a cleaner, so you can concentrate on you, your bumps and your DD!