Don't worry about whether you are making progress or not. Just keep your attention on the Self twenty-four hours a day. Meditation is not something that should be done in a particular position at a particular time. It is an awareness and an attitude that must persist throughout the day. To be effective, meditation must be continuous.
If you want to water a field you dig a channel to the field and send water continuously along it for a lengthy period of time. If you send water for only ten seconds and then stop, the water sinks into the ground even before it reaches the field. You will not be able to reach the Self and stay there without a prolonged, continuous effort. Each time you give up trying, or get distracted, some of your previous effort goes to waste.
Continuous inhalation and exhalation are necessary for the continuance of life. Continuous meditation is necessary for all those who want to stay in the Self.Constant meditation is the only way. If you bring light into your room, the darkness immediately goes away. You have to see that the light is not put out. It has to be continuously burning so that there is no darkness. Until you get firmly established in the Self, you have to continue with your meditation. Doubts take possession of you only if you forget yourself.
What if nothing exists and we're all in somebody's dream? Or what's worse, what if only that fat guy in the third row exists?