I dont think it was wrong for you to not go. I mean seriously, your 39 wks, Id take advantage of the sleep while i could. And since you didnt receive and invite or anything, Lack of planning on thier part shouldnt constitue and emergency for you. And wow, no offense but how dare someone guilt you by telling you "well she went to yours" thats downright mean. ..If you feel like it maybe send her a baby shower card or get something for the baby when it comes if you feel like it. You have your hands full right now anyway. I bet if you let her know why you couldnt attend she would understand. Good luck and early congrats on your baby!
Candice in Colorado