Welcome to the forums!
While a 20-g/day limit works well for most people, you might be one of those whose insulin-resistance is so high that you need to restrict your carb intake even further. If you want help troubleshooting your diet, you can post a few days’ worth of what you eat, and we can see if there are any obvious problems. It would also be helpful to know your age, sex, current weight, goal weight, and medications–assuming you feel comfortable sharing them.
Also, the suggestion to go full carnivore is not a bad idea. Beef and water is the ultimate elmination diet, for example, and a lot of people have found things like the Lion Diet and Dr. Berry’s beef, bacon, butter, and egg diet (BBBE) to be helpful, as well.
Lastly, because you are eating in a way that works better with our human biology, you don’t need to fear eating too much. Be sure to eat enough to satisfy your hunger. That may be a lot of food at first, but people generally find that their appetite drops, once their body is assured there’s no famine going on. Also, our metabolism speeds up when we eat less glucose and more fat and protein, so that even with the lower appetite we are burning more. This allows the body to draw down its store of excess fat, while also metabolising the fat in our diet. You will find lots of posts from people on these forums who found that their fat loss began in earnest once they started eating more, not less, paradoxical as that sounds.
So be patient, keep calm, and keto on!