Back and chest pains and constant burping

My wife of 58 years has had many operations for various things. She has leaky heart valves and is on warfarin. These past few days she has had back and chest pains and an urge to burp. She has lost her appetite and is looking frail. We have visited the doctors and they have put her on a course of anti-biotics which I think will only upset her INR levels. Im getting worried  about  the situation

[Paderla Anitha, DNB]

Hello and hope you are doing well.

Your wife's symptoms of chest pain and loss of appetite could be attributed to her cardiac condition. Her symptoms could also be due to an infection. As the infection resolves and her cardiac condition stabilizes, her symptoms should improve. If you are worried about her INR, monitor at regular intervals.

Hope this helped and do keep us posted.