It’s great you’ve started, and you need to hold tight.
Your body’s current state is the result of years and years of inappropriate eating habits - we’ve all been there.
Be patient.
By going keto/vore - carnivore, you’re giving your body an electroshock. While your personal objective is healing GERD, your body has a much larger agenda: it needs to adapt to the change, learn to get its energy from ketones, burn off unhealthy visceral fat and heal globally all at the same time - that’s a lot.
It took me a good 8 months to transition over. For example, no more acid stomach / GERD, post-meal lose stools have completely stopped, my body format has improved greatly, and I’ve naturally moved to one meal day, because I’m not as hungry as I used to be.
Continue on as you’re doing - no carbs, three meals a day. When you start to notice you’re not hungry before a meal, skip that meal - fasting will be key in your healing process.