Welcome to SR,Sue. Glad you found us.
Work was very stressful for me as I approached my 60's. I developed a problem with alcohol in my late 50's. I believe there was a direct correlation with stress at work and my accelerated consumption of alcohol.
Thankfully, I found my out of that mess. Stopped drinking. Made it to retirement age. Done and dusted.
It sounds to me that you are ready to makes some changes in your life. How about instituting some sober nights? Say no to the gang once in a while. Tell them you are beat and want to go home to jammies. They will accept it if you say it enough.
And if they don't, tough. It's your life and your. Health.
The symptoms you describe could be from alcohol. Could be something else. Not a physician, so I can't speak to it. Only way to know is to get a workup. Maybe another doctor, not the family friend?
Good luck going forward. Keep posting and let us know how things are going. It's a pretty supportive group.