Is This Normal???

So I am just weeks (3 weeks) away from Nora's due date. I am tired and exhausted. All I can think about is going away on my own vacation and leaving my son and husband at home. I just want to lay in the sun somewhere and have peace and quiet and just relax. Does that make me a bad mom? My temper is so short now and I snap at Porter and Kyle for the smallest things... I just feel like I am running on fumes. I stopped caring about my weight weeks ago but I am still only up 19 lbs. I wonder if this lack of weight gain is affecting my energy or my mood. Bless Kyle for putting up with me these past few months and especially these last few weeks. I don't know what I would do without him... actually I do. I would go insane. He works so much and now with his CFA at hand he is studying every moment he is not at work. And I am going insane. This weather has not helped either. I love taking Porter outside and going to the park and going on long walks... but being stuck inside hasn't helped Porter or I. We are starting to get cabin fever. Is it normal to just want to disappear to Hawaii or Mexico until this baby is ready to come out? If I think I am tired now, I am really going to be tired with a newborn and my busy busy busy son. I feel like such a horrible parent. Any suggestions?