Welcome to GMAT club! Here's a list of all the GMAT practice tests out there: all-gmat-cat-practice-tests-links-prices-reviews-77460.html?fl=menu
I recommend purchasing atleast one Manhattan GMAT
book (preferably the 5 quant books) and you will get access to all 6 of their practice tests. One book will run you about $25 bucks.
Another recommendation is to look around our forums and soak up as much info as you can! This is a great community for you to start and finish your GMAT journey at and continue through your application process.
Also, take a look at my post here so that you can connect with fellow GMAT takers in May: all-may-2012-gmat-test-takers-129458.html
Also, here is a study plan if you are in need: gmat-study-plan-start-your-gmat-journey-80727.html?fl=menu
Plus there are 100s of other incredibly informative posts on the site, so look around, and make the best of those 7 weeks!
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My GMAT and BSchool Tips: