Twins?

kari
So I concieved on my first round of clomid. Now 5wks 1day Preg. This is my 3rd baby. I'm so much more tired this time around than with either of my other 2 pregnancies. My boobs are 10000xs more sore than I remember them being before. This time I am feeling so much cramping! I never even noticed any cramping this early with my other two plus I've been very dizzy and very thirsty! 
I know clomid can increase your chance for multiples. Just wondering if it sounds like it could be twins to anyone else? My first appointment isn't until March 18th and the wait is killing me!