Try and do more exercise - going for long walks (always carry plenty of water with you though), or pregnancy workouts or whatever low impact, pregnancy suitable stuff you can find on youtube. When you start burning fat, your hunger goes for a while as your body has another source of fuel.
I guess the only other thing would be to eat small meals at regular intervals, but only eat very healthy foods, with no junk.
You might have to put up with feeling slightly hungry most of the time, but you shouldn't be ravenous.
It could also be that you have just put on most of your weight at the beginning of the pregnancy, and it will slow down from now.
Sometimes people put on a lot of weight, but it's clear that it's almost entirely with "the bump" and they haven't gained much weight in other areas. I think if that's the case, then you should be okay. But if you are putting on weight everywhere, then that's a problem.
Really, people here can only advise on what worked for them or what worked for their friends. Could you speak to your doctor or midwife and ask them to help you come up with an eating plan?