I have gained 13-15 pounds since I have been pregnant and I'm only 6 weeks pregnant.. could it be twins? You can also tell I'm pregnant I look like I'm about 18 weeks.. we have one set of twins on the side of the family. But that's it. Could I possibly be farther along? I never have had two periods in one month but i did this month one on the 4th of october and one october 30th the one on the 30th i only bled 3 days not the normal 5.. if i go by october 4th as last period id be 9 weeks if i go by the 30th id be 6 weeks if im 9 weeks could i already be showing amd gained this much??