What you may have is central apnea instead of obstructive apnea. Central apnea can affect a person during the day, with lapses in breathing or very shallow breathing because of lack of signaling from the brain, while obstructive apnea is significantly less likely to occur while awake, as obstruction mostly happens due to muscle relaxation and lack of awareness due to unconsciousness. You should get a referral to a pulmonologist or a neurologist for assessment, as most "sleep labs" are for sleep related issues only
