Some people just tend to gain lots first half or so then it may slow down.
Are you considerably less active? What's your diet like? You might be able to make some simple changes. Have you thought about swimming?
My first pregnancy I went from 8.7 stone to about 11
. I was a walking food monster, I had always been careful about my weight and just ate whatever I wanted, whenever I wanted. I was also broke, living away from home for the first time so bought cheap, bad foods and had to make do. Afterwards I found it hard to get active, was exhausted. Eventually I joined a gym with a crèche, did 4 mornings a week at classes. Felt great.
Second time I was quite sick at beginning so ate whatever I fancied, then craved Lollies and crisps. I didn't put on as much.
This time I have totally craved fruit, loads of it. I weighed myself at about 11 weeks and had put on 8lbs. I was gutted as I'd been working out loads, seeing a personal trainer and looked the best I had in years. I was so scared of mc in first trimester I totally stopped all activities, and I'm sure this is why I gained. I am now 20 weeks, haven't weighed myself since but feel like I've not put on as much as I have before. I am more active with my job, and the fruit craving is better than crisps that's for sure!
However, I think as long as your being healthy just enjoy being pregnant. If I fancy something, I'll have it. I'm walking most evenings with the other 2 and I'll worry about the rest after the baby is born.
Don't be so hard on yourself OP.