I am exactly the same size, weight and age as you so I know exactly how you feel
I have had two early scans because of a bleed and no comments were made regarding my size and they could clearly see the babies (high bmi and twin pregnancy!!).
I had my midwife appointment last week and she didnt make any comments about my weight, just wrote it down and said that because of my higher bmi I would be offered a gestational diabetes test at 28 weeks and offered a dietician appointment (although she said that most people turn this down).
I read all the horror stories online like you have but I honestly haven't had any problems yet and am trying to remain positive about the rest of the pregnancy. I have worried about EVERYTHING else, I am not joking, and think I will until I have my babies here and healthy but my weight isn't worrying me now as there is nothing I can do about it at the moment, I am just focusing on staying healthy.
I also keep telling myself that if my weight was a major issue then I would never have got pregnant.... that being said I will be looking to lose it once bubba's are here