Hi there,
Like you, I am obsessed with the number 4. Everything I check has to be checked 4 times and it has to go along with "tapping" in my head that's like 4 beats. The only way I can check things is if I count to the number 4 in just the right way. I've started trying to count to a different number, like 5 or 6, and by counting further than the number 4, I won't be able to check things. I don't know if this makes much sense to you, but I haven't "checked" anything in two days, six hours. This is definitely a big accomplishment for me. Don't know if this helps at all, but I do hope someone can give you more suggestions.
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Lori