Weight gain and food cravings

I can't stop eating junk and have already gained the max 5lbs that I'm supposed to in the first trimester...I'm only 9.5 weeks! At 5'6" and 142lbs, I'm still a good size but am worried I'm going to turn into a balloon! I have food aversions and cravings. I mainly eat carbs and cheese and try to fit in at least one fruit and one veg a day. These cravings are getting the best of me. My job is quite physical and I'm on my feet all day. When I come home I'm exhausted and I think that makes the cravings worse. Anyone else out there gaining weight?