I'm 35 and still hoping to try again for a DD.  I'm a little scared, though, when I think about getting up with a newborn again.  I'm interested to hear how other mature mamas did with an infant.  The sleepless nights seemed like no problem when I had my first 3 in my 20's, but now I am just wiped out at the end of the day and can't imagine not getting a good night's sleep.  Did you adjust to the sleepless nights? or did you feel exhausted all of the time?  I just want an idea of what I could be in store for.  Thanks.

 lots and lots and LOTS of coffee the next day.

also if my dd wakes up in the middle of night i bring her into bed with me....i'm not sure if that is an option for you 

i actually breast fed so he was in bed with me and my hubby "didn't have the little side co sleepers that i knew of then" but he would nurse i would fall back to sleep and we both slept threw the night  he didnt go in a crib until he was a year old  i had to plead DH to get a camera in his room and little t.v  from toys r us so i could see him then i put him in there lol

 Mentally, I've been able to handle it...I can still function but PHYSICALLY!  OMG.  Dark circles, lank hair, you name it.  This baby has really taken a toll on my looks!  Sorry for the bad news...but a DD is worth it, and you are on the "young" side of being a MM!

 Strangely i have found the whole lack of sleep alot easier this time around even though i am now in my 30s.  I think i have more patience and know from the others how quickly they grow out of the baby stage so tend to embrace it all a bit more.

I do whatever gets me through the day for energy - lots of coffee and chocolate - and make sure i get to bed early and i also take baby to bed if he's having a bad night.  The older kids will often get him up in the morning and let me have a bit of a sleep in also - one of the big perks of having a gap between kids.

IMO  - lack of sleep is well worth the joy of a baby