B..
Just a quick response to another poster...breastfeeding is NOT birth-control...AT ALL. This is such a myth. ARGH!! You CAN and probably WILL ovulate without getting a period!! You don't have to get a period to ovulate. Look at the dozens of questions on mampedia about woman who got pregnant while they were breastfeeding and didn't have a period. My best friend just had a baby and a family friend is about to. Their children will be 11 and 10 months apart. Both never had a period. My sister didn't ovulate for over a year, because of fertility problems and got pregnant. you do NOT have to be on your period to ovulate. I am only saying all this, because you are getting very bad, inaccurate advice.
I suggest getting to book "Taking Charge of Your Fertility" It's a great resource. We personally do not use NFP, simply because we don't want to get pregnant again...ever. My husband is getting a vasectomy instead. This does still carry a slight chance, but way less the NFP. If you do NFP perfectly, it is pretty good. I have known a few people who have tried, but they had irregular cycles, so it was very difficult for them. You might wait until your period is regular, to start this method.