Yesterday I had what I think is a sudden onset of indigestion. I was still in bed after waking up and therefore had not eaten. It was a tight feeling on my left side of chest and a feeling of nausea. Lasted quite a while and initially I was concerned it was my heart. Lots of googling and monitoring how I felt throughout the day leads me to think it was definitely indigestion and I took some ACV to help. Today there is still that strange feeling just below my ribs, slightly gassy, etc. I'm wondering why this has come out of nowhere- I've never had had indigestion in my life ( I'm late 40s), am slim, fit and have a mainly light healthy diet ( plus wine!) Any cause for concern at this out of the blue change?