Congratulations to you and the intended parents both!
I'm 15 weeks along myself, and I went through a major "I think I've got twins" phase around 8-12 weeks along - I was/am carrying larger than I think is normal but the doctors say I'm normal. And the ultrasound showed the same for me, just one, but maybe it's natural for an expectant mom to wonder if there are twins inside, eh? Although in your case, I can see how it would be even more of a liklihood!
My morning sickness abated around 12-13 weeks along, as it often does, but until then, ginger is supposed to help (it didn't much for me though). I did find chewing mint gum (for some reason) would help a little bit. I hope things get easier soon, and be good to yourself!
And to keep this Tarot related, I asked my friend to read for me on if I was having twins or not (prior to ultrasound) and she pulled the Maat deck's King of Pentacles reversed, hanging upside down in his golden sarcophagus in pink flowers... so maybe it's a boy?
edited to add: oh yeah, smells would trigger me, like mentioned above. Coffee, which I love too, sometimes made me go off. And "morning" sickness is a misnomer... it was morning, afternoon, evening and middle of the night for me until it went away. BLECH!