Is it possible to get acid reflux this early

Mr

I'm literally FOUR weeks pregnant with #3. I ONLY get acid reflux while pregnant. Never anytime else. With my first I got it during 3rd trimester pretty bad. With my second it started during my 2nd trimester. Now I'm literally 4 weeks pregnant with #3 and I have really heartburn keeping me up at night and stays until morning. Is it even possible to get this early!?