You are ten weeks pregnant and look 5 months pregnant could it be twins?

It could be. With twins the doctor usually notices that your uterus is larger for your dates, and the woman tends to look a little larger then she would with a singleton. However, if you are a larger woman to begin with, you may carry bigger. Also, weight gain has a lot to do with it. If you have gained a lot of weight during your pregnancy, you could also look further along. The best way to tell if it is twins, is to have an ultrasound.