Welcome Stu
Yup, a lot of chest pain in my drinking days. Beer/alcohol/whatever kicks the crap out of your heart! I was a heavy beer drinker like you. But it's not so much how many beers you drank, it's where it took you. I did not like what I was becoming, so I got sober.
I am coming up on 3 months sober, It's taken me a year to string this many days together, but does not have to. AA is working for me, now that I am working the program!
Keep coming back here and posting, but don't make any bones about it -- get to your doctor immediately for a check up!
Just for today...
Ken