Hi and welcome to both the boards and the vegan lifestyle!
Can't immediately offer up help without knowing more about both where you are currently (height, weight, current foods and execise) and what your target/need areas or issues are? I guess I'm better at tweaking the things you are already doing as opposed to giving you a wholesale 'do this' guide -- not one size fits all.
Nutrition will be key to your success. There are multiple ways and approaches to both tightening up, body sculpting, and when to start your 'cut' to drop body fat about 3 weeks leading up to competition.
Coincidentally, I did just find, read-about and engage with Amanda Fisher on facebook/twitter. Successful vegan bikini competitor. Will post a link below.http://femmefitale.com/amanda-fisher/