Gaining weight

So I know gaining weight is perfectly normal. Here is my issue. I'm 5weeks 6days and I have gained 7 lbs since finding out on the 24 of nov. My eating habits are the same as they were before I got prego. Minus a few cravings but not enough to make me balloon up. I'm not longer bloated. I feel normal. I wanted to watch my weight since I'm slightly over weight and this is baby 5 so I'm not a newbie but I haven't had this problem with gaining weight so fast before. I'm trying be careful so I don't get GD since I have escaped it with my other 4. Although I'm not sure if this would make me get GD. I need any thoughts or something because I don't see how this is normal :(