Oh gosh YES!!!
First, breastfeeding as birth control can only be relied on for the first 6 months while the baby is nursing every 2-3 hours during the day and 4-5 at night. That being said, many women still get their cycles back before that.
Second, you ovulate BEFORE you get a period, not after. So, whenever you got your period, you were fertile about 2 weeks before that.
Third, the little-known fact about frequent breastfeeding and ovulation is that you may still ovulate but the hormones produced while breastfeeding think the lining of the uterus so that if you conceive and the egg implants, it usually doesn't take and you miscarry before you realize you're pregnant. It's basically the science behind the Paraguard IUD and the mini-pill.
So, what you need to do is start tracking your fertility (Everyone will tell you "Taking Charge of Your Fertility" is best). And have sex when you are fertile. Don't get discouraged or worried about infertility because as long as you are breastfeeding, there's the chance that the lining is thinned and will slough off even if you conceive. You just never know:) I have 1 friend who never got her period and got pregnant when she and her husband started trying to figure out how they'd conceive if she hadn't had a period. I got pregnant while nursing all day but my son was sleeping through the night. I have a couple other friends who were nursing and tried for a couple months and were successful even though they were nursing around the clock. Another friend was on the mini-pill but not being very careful and got pregnant. We all nursed right through our pregnancies and tandem nursed the two at the same time.
It sounds like your body is probably ready. Enjoy!
Just to clarify on another post. It's totally a fallacy that you have to stop breastfeeding while pregnant. Unless you have a history of preterm labor or you are high-risk, the slight contractions during breastfeeding will NOT abort your pregnancy. I'm sorry Lisa was told that:( There's no reason to wean a nursing toddler after finding out you're pregnant. If you want info, PM me. Or there are hundreds of links and a handful of books about it. As for Jenni's post, yes, both take nutrients. But that isn't a problem if you eat a healthy diet.