The other way you can use until you decide to go see your doctor is condoms. You should be able to get these from your local pharmacy (in the UK not sure in USA). They will also help protect yourself from STD's. No matter what form of contraception you choose it's always a good idea to carry and use condoms and practice safe sex.

__________________
What is life?
If not an excuse for death,
and what is death,
if not an escape from life?