feeling really tired is all part of it. It will get better for some around the second trimester. During my first trimester I would sleep all the time and you will be suprised on how much better you will feel even with a 30 min nap.
Good luck just rest as much as possible.
TTC 2nd 10/00
our angel 2/16/05
10/16/08..... AVA GRACE
Maybe TTC #3 if it's ment to be ok if not ok not stressing this time. :-)