hun you really are quite organised and if you work through your list with a couple of things to achieve each week you will soon have them all done. if you can try to think of each task as a wonderful opportunity to enjoy your wedding for the 4 months leading up to it i am sure it will feel more fun.
is there anyway you can delegate tasks you are not too worried or attached to? i found this was a great way to include my friends and family in the build up and to share your excitement. it is about the experience, not whether it is perfect or not, and it can be whatever you decide it to be. perfection is not the ultimate goal, having a true and committed ceremony and fun party with your guests is what it is all about.
huge congratulations to you and DF!