I Forget To Breath. A Lot! Is That Normal?

I never use to forget to breath, but recently (like the past month) I have been forgetting to breath all the time! Like I'll just be on my computer answering questions on here and I realize I haven't been breathing! I think I exhale and then never inhale! I'll be minding my own business than it's like BAM! And it's like I haven't taken a breath in a minute and my lungs feel like they are gonna collapse until I start breathing normally again. Is it normal? Can I do anything to stop this?