Stop the insanity!!!

Ryan has been waking up almost every single night for the past month and a half!  AHHHHH!!!  At first I thought that maybe he was waking up because we had house guests for most of February and his schedule got a little thrown off.  But- some nights he was completely soaked through- so we went up a size in diapers hoping to solve the problem..... however, he is still waking up only now he's dry.  I think he may also be waking up because of night terrors (since I really can't blame it on teething- I don't see or feel any new teeth coming in).  And the waking would be fine if he would just go back to sleep after 10-15 minutes.  But NOOOOO- this kid stays up for 1-2 hours.  Sometimes screaming most of the time and sometimes just wanting to play.  We have tried tough love and letting him cry- doesn't work.....he just gets more and more worked up.  We have tried rubbing his back and singing to him- doesn't work.  We have tried re-creating his bedtime routine- reading him a couple of stories and then saying "night night" to various things in his room- doesn't work.  I am so tired and in so much pain- that it's getting more and more difficult to get out of bed every night to tend to him.  I wish we could afford a night nanny who could work an 11-7 shift every night :)  Well, I guess Ryan is just giving us practice for when his brother gets here....  But I was kind of hoping that I could get as much sleep in as possible now since I know I will be completely sleep deprived when the baby is here.  Oh well.....