Yoga is a daily activity. To get benefits of yoga and meditation you need to do it daily with devotion for years. Its like you want mangoes the next day you plant the seed! For gas problems please include asanas like pavanmuktasana, halasana in lying pose. Makarasana, shalabhasana in prone pose lying on stomach. Vajrasana and mandukasana ( frog pose) in sitting posture. Continue doing yoga daily and mark my words nothing will go waste!

It's is suggested to stop kapal bhati. Your stomach problems will agrevate. While doing meditation don't instruct your mind. After breathing exercises and omkar chanting just watch your breathing rhythm. This will help you.

before food take 1tsf hingavastak churna with luke warm cow ghee. bfore sleep take triphala tablet 2 or 3 with luke warm water. avoid curd,bakery,frozen,formented food,and late night food, take dinner before 8 pm. walk 45 mints in morning helps yu more in gastric prblms drop cow ghee in nostrils before sleep helps you more in concentration.