6 weeks today and feeling great!

Heather • 💙Otto Wayne 9/7/18 💙💚Owen David 5/22/20💚
Six weeks pregnant today, my only symptoms (knock on wood!) so far are acne , mood swings and huge appetite lol I feel great! I'm hoping the whole pregnancy is blessed like this!
I wonder though- would I automatically feel more symptoms with twins? (They run in my family and I'm really hoping that there is two babies in there!) 
My first apt isn't until next week and I'm sure they won't do an ultra sound until the apt after. Would they tell just by listening if there is one or two?