I am trying to naturally induce lactation by pumping and taking herbs. I am on my 12th say of pumping and I have noticed that my period has not started yet. I am about 3 days late. I am crampy like I am going to start but I have not started. Is this due to the hormone changes with tryING to induce lactation maybe?

It could be if you have problems producing milk, the doctor can always help you with prolactin and oxytocin! Always with doctor!