Be patient, 9 months time you will know! Its such a great feeling becoming a parent and the anticipation is immense and once the little baby is in your arms you will love it unconditionally being either a boy or a girl as from that minute you have to deal with that child here on in.
If you find out before, such as a scan you will have time to think to yourself "a boy......hummm.......I would have liked a girl" or "a girl.......hummm.....I would have liked a boy".
All the best for the future, and dont rush into buying fancy colour cordinated cloths, neutral colours are really nice as not to sex a baby, it gives a great oportunity to speak to people who will ask "is it a boy or girl", where as thet would jump to the conclusion early if wearing pink or blue.