early symptoms, does this mean I'm having twins?

Leah
So I've been having pregnancy symptoms before my test even came back positive! I've been so nauseous since "day one" of my pregnancy. I'm only 7 weeks along but my breasts are already up a cup size and so heavy I can no longer sleep without a bra. I am so tired all the time but I'm also experiencing insomnia at night! I've never been a morning person but in waking up at 6:30 bright eyed and bush tailed. My doctor says I might be having twins even though it doesn't run in either of our family's because of how severe the symptoms are so early on in the pregnancy.  My first pregnancy was super easy and I had very few sysntpoms. Just deliriously happy all the time and towards the end nonstop heartburn. For those of you who have had twins, is my doctor wackadoodle or right on the money?