Your doctor's idea that things take time to regulate sounds like a reasonable likelihood. It is understandable that you are frightened, but most likely giving things a little more time is the best thing to do.
Lactation and breast feeding are normal contraceptives. They help to space babies so the mother's body can feed her new baby before her body is trying to grow another one. Usually by 6 months things start to get back to normal, even with breast feeding. In the meantime, be sure to eat healthy, drink lots of water and milk yourself and take calcium and multivitamins. If you are anemic, take iron tablets too. Try to relax as you give your body just a little more time.
Machelle Seibel, MD