You are not alone, I get obsessed with booking travel, and I can't get it off my mind until I do it. I obsessed on going to Vegas for two months and finally booked it last week, and then had a sigh of relief and slept, then guilt.
I try to ride it out, and distract but it doesn't work all that well as is obvious.
So I know about the urges and the guilt. If you find a cure, let me know!