GERD and constipation. Improvement.

I am suffering from GERD since past 10-15 days. I have tried to fix my routine and included 20-30 mins walking after every meal. I am also taking light food most of the times and avoiding tea coffee etc. I also realised that my bowel movements are not regular and I am mildly constipated. I also have gas issues and bloating. I already took Pantakind for 4 days and Pan D for 3 days. In past 15 days I also had Gas O fast 2 times only. I took unienzyme 3 days ago and the next day my bowel movement was fine but again the next day i didn't have any urge to do it. Currently I have taken Dulcoflex. Most of the times after eating my chest feels heavy and tight which relieves after few hrs only when I walk and take warm water. I am not seeing any proper improvement.