It sounds like you enjoyed the achieving of a goal (by filling a hole on your album page) and now you are over-whelming yourself with too much info and stamps to really appreciate that you have reached a goal or not as there are too many to get to.(?)
Perhaps setting realistic goals and setting a time frame to achieve them in, and writing them down (it helps) would calm the waters of your ever questing mind.
It is fascinating to read your posts as you seem most focused but say you are worried about not being focused enough. Maybe reviewing what you have accomplished as you travelled along the stamp collecting road, see how far you've come and the mile posts you've passed would also help.(?)
Speculation on my part of course. You are you. You know best. And I do tend to meander off on side paths at times.
I used to have this as my wallpaper on my computer:

At least it has a nice stamp on it.
