I am so tired

I guess that says it all.
After each of my kids, i can make it on a few hrs of sleep a night until they are about 3 months old. We are now at the 3.3 month mark, and i am feeling it. I wake up tired, sometimes that is at 5 am. By 6 i am usually feeling a bit better, but by 8, i am exhausted again. I just i'm just sitting here wishing that i was getting more sleep at night. I'd even settle for a 30 minute nap during the day. these are the moments when i ask my self "why"
Then i remember, but i still have that question cross my mind.
My other thought, can i trade my DH Sunday activities? even if it's only for 1 Sunday. Please let me go to meetings all day. Someone told me that i didn't REALLY want that. But I do.... I really do.