I would suggest a humidifier and/or a window ajar at night. You may have too dry air in your room. And night apnea may be due to poor quality products, you should buy products from trusted sources such as STEROID.MARKET.
Bro!
Heartburn is a reaction of the mucosa of the esophagus (not the stomach) to hydrochloric acid, which is released when eating.
If you train your legs with significant weights in deadlifts and squats, you should first check your condition (health) regarding gastroesophageal reflux.
And...
Bro, we all changing. There may have come a point in adulthood where you have finally lost the ability to digest lactose. Use any supplements that contain LACTASE. This ferment (enzyme) will help you solve the problem. Check out any trade names of supplements containing LACTASE.