Any one else about 12 or 13 weeks prego? or any tips for me please!?

I haven't had my first ultrasound yet. I think I'm going to cry wolf this weekend and go to the er complaning of cramps... Is that bad? Also when are you due and how do you feel? I don't feel pregnant at all!!!! My tummy has grown a very little.. Like my pants are getting tight and two pairs ripped lol they were old. But other than that I just look like I'm getting fat.. Also has anyone been craving anything.! Me has been anything with melted cheese like steak and cheese, cheesey fries (with nacho cheese) and bacon. Oh my god so good!! But so un healthy lol. Also any excersice tips??!!! Please share!