Heartburn this early at only 4 weeks?!?

I’ve heard women say they had horrible heartburn during pregnancy but I’m only 4 weeks and it’s INSANE already!!! I suffer from severe acid reflux as it is and take a prescription pill every morning since I was 14 to prevent heartburn so I sometimes get it pretty badly to begin with on a bad day. But most days my pill does the job and I’m fine. This past week my heartburn has been awful! Nothing is helping and it’s literally keeping me up at night and I feel like I can’t even move sometimes because it hurts so bad! Is it normal to have that this early on? Or is it unrelated and maybe my regular acid reflux is just acting up?