Well done for making such a difficult decision, I was about to put across my point of view but there is no need now that you have made your decision! I certainly think you have done the best thing by following your instincts, as you say this will be your last baby so it would be such a shame to miss out on so much of their precious first few months. And I must add that as a nutritionist I really think that breastfeeding is so important if it is at all possible, even if it is just for a few months it sets them up for life.
All the best! :-)