Stopping birth control ?

Samantha • Expecting baby #1 March 2016 --
Hey ladies I have a question. I been on birth control for about 4 months I plan on trying to conceive in July ovulation gods willing. I'm trying to lose a few pounds and prep my body for the pregnancy . My question is should I stop the birth control now ( I'm suppose to start a new pack today ) or should I begin and finish out this pack and then discontinue ? 
Thanks for any advice or tips
If it helps on on minastrin fe24 1mg