Ttc? Questions?!¿ HELP!

I'm under 20...I have been with my boyfriend since the beginning of april...we have know each other for 5 years...ttc for 6-7 months....does anyone know anything that I can do to get pregnant fast....I want to try for this month! My last period started November 14. Ended on November 20. Period usually 7 days long....cycle lengths 31 days...Ile take ANY advice at all!