One week and I lost my strength.

Hi Guys,
maybe you can explain this.

I decided to get my pull ups to the highest reps possible. All I do is every other day 3-4 sets each one to failure. About 4 months and I increased by 6. I started with 8 and last time I did it, it was 14.
I only did 14 one time, right before the vacation.
My vacation was one week. I worked out with out breaks for a long time, so I decided that a week break would be nice.
Today I did my pull ups, it came out to 12, almost 13 but not even.
I thought that if I recuperated I would even more or at least keep my 14.
I know that at some point may be in a week or few I will do 14 again.
Just wondering why this decrease in reps had happened.

Thanks. :-D

[Appleman]

Bro, it sounds like you just began doing pull ups 14 times. It's easy to loose it like that. If you were able to do 14 for a while and one week threw you off, than it's something to get concerned about.
Don't worry, you'll get it back. Like you said probably will take two weeks or so.