W. - not every woman loves being pregnant and I AM ONE OF THOSE!!! BUT, it's almost over for you and it is SO worth it once it is!
I'd try soaking in the tub, my girlfriend was treated to massages that helped her a lot - get plenty of rest and take care of yourself! It's kind of like my 2 1/2 year old right now who has this hell-virus and the only thing she can have is Motrin, Lemon and Honey. Hmph.
I laid down as much as I could at the end of my 2nd pregnancy. Have you read what to expect with each trimester? You have energy in the 2nd and then by the 3rd get tired again. Your body is going through changes, your bones are getting ready to move, you have this 6-7 pounder in you....things are supposed to be uncomfortable by this point.
Sorry if I didn't help you much - but you've come to the right place for advice. I was just wondering your age.
Good luck! and at least you'll have it easier when your baby gets here! I've found that boys are easier than girls! ;)