I was going to say Red Balloon too. Get something the whole family can enjoy, or at least participate in given bubs really isn't going to "enjoy" anything yet. That takes care of the big pressie without you having to do any running around at all. Otherwise, depending on what you feel you can cope with post Christmas, do up an itinerary for the holidays. It doesn't have to be set days - just a "on one day we'll go to the zoo, on one day we'll go to the beach and buy ice cream, one day we'll go out for afternoon tea" etc. You don't need to do any shopping now - just 10 minutes on your computer. If you feel up to it, you could make a bit of a treasure hunt out of it - leave an initial clue under the tree and the kids can wander around the house finding the next clue and prize. Then if your kids are anything like mine grab a basketfull of stuff at a craft store and they'll be in heaven with lots of little bits to open on Christmas Day, and hours of fun occupation after. Your hubby is I'm sure big enough to understand that you're having a tough time, so time with his family (if he can get it) to participate in activities, and a box of choccies/bottle of drink should be enough.

Sorry you're struggling. I hope its easier for you soon.