I know this may sound weird but I have noticed a white build up around my vagina and in between my lips, does this mean I have a yeast infection?

Yeast infection? Very likely, especially if it itches. If it doesn't itch, you can just watch it for a while; it may be just normal dried out mucous discharge. If it itches, go ahead and treat with an otc cream like monistat or clotrimazole.
Possible. Yeast usually itches or irritates. You should see your gyn, as in my patients , i would do an exam and cultures to start out with.