I didn't take Clomid only - I had Ovidrel and IUI also but I ended up with twins on the first round 50mg.
Also, all the people saying the complications from twins are really high are freaking me out. I'm 13 weeks and now wondering what is to come in the future in terms of complications.
Don't worry too much - tons of people have easy, complication-free twin pregnancies. You'll be fine.
I think most of us bring complications up to kind of warn the "wishers" to be careful what they wish for, if that makes sense.

I wouldn't change this pregnancy to a singleton pregnancy for anything, but knowing what I know now I also wouldn't have wished for it (and didn't wish for it - but am so happy now, of course).