Germane, if you are not having sex, you can do anything. If you are having sex, you should not cut the pack short. You can just skip the brown pills this cycle. When you get to day 25, start the next pack and throw away the inactive brown pills. This way you should only bleed when you get to the brown pills of the next pack.
Nothing is however guaranteed when you start birth control pills. No matter what you do, breakthrough bleeding and spotting is fairly common during the first few cycles.
You might also be pleasantly surprised about your period when taking Loestrin. It makes periods much lighter and shorter, and take away most of the PMS.
Best of luck!