This reminds me of when I used to be competitive in the PvP scene of an MMO... I took a month's break to travel and by the time I returned I was completely destroyed by everyone I used to fight, including by those I used to beat consistently. At that point, my pride was shattered and I could never get back into it. Trust me, I know how it feels.
Best thing you can do is...well, get back into it. If you don't, you're not exactly going to become better again. I didn't back then, and the end result was that I simply stopped playing (since PvP is basically what kept me coming back). Finding time to play can be difficult if you're busy, and even missing a few days can have a noticable effect, but it's better than simply giving up and quitting because you didn't dare brush up on your skills again.