I'm genuinely scared of not being able to sleep for years when baby comes: can you console me?

Forgive me if I sound like a whiny baby myself, but I have real issues with sleep. I can't sleep with a fan, I can't sleep with earplugs in and I can't sleep with an eye mask on. At the same time, I'm sensitive to sound and light, particularly. I take a long time, sometimes hours, to fall asleep, even if I've been awake for 48+ hours prior. If I get woken up, it's rare I'll be able to get back to sleep.When I am tired, as in gotten less than 3-4 hours of sleep, I'm completely zombified. I can't usually be bothered to shower let alone go to work, I tend to just work from home and be useless for the day. I don't cook, can't be bothered to even eat.But when I do get a well rested sleep, I'm like a different person. Super motivated, can do anything, cook multiple meals in batches for the freezer, lets go sort everything out ever, lets do all the housework, lets go see every show and walk all the way there.I'm usually the perky peppy person above, but with the heat at the moment I'm back to being the zombie, have barely slept since Thursday. I'm really really scared that when baby comes, I'll be this zombie all the time for years. Like, genuinely scared.Help? via /r/Parenting http://ift.tt/2tybYFg