IF and heartburn

Ive been following SCS for 3 weeks with great success. I love the IF. I eat 2 meals 4oz protein with salad twice a day between the hours of 1 pm and 7 pm. The only problem is Im having a lot of heartburn during the day. I did suffer from acid reflux and had a scope. I had changed my diet even prior to starting SCS and the night time acid reflux was pretty much eliminated by not eating at night and reducing my weight. but now I am having this burning during the day. Will this correct itself at some point? I do take some Gaviscon for some relief but that certainly is not sustainable. I looked up the things that may cause heartburn and I am not eating those things (except salt due to low blood pressure which is normal for me). Anything you could provide would be helpful.