I'm a bit late on this thread, but just want to add my vote for you to go on your holiday. You definitely shouldn't miss it - imagine how your daughter would feel (not to mention how you would feel!) if you cancelled and the baby arrived early or late, after you would have been back. As you say, you got a good deal that you'd be unlikely to get again. Go to Grenada, have your holiday of a lifetime, and spend it looking forward to a lifetime of love and cuddles with your new GC.
Static caravan purchase is it worth buying
What Should You Know Before Ordering Wagyu Steak Delivery Or Buying Wagyu Steaks For Sale Online?