A rough patch that will pass maybe a memory or flashback of something your going through. Try to find out which alter isn't tolerate to a child crying if that is the case. I say that because are you this way 100% when a child cries? If the answer is no, then you are having an episode that your healing from to where your feelings are emerging and it's now safe to cry about this one thing. I have done the same thing, I told my children no more wrestling until I can figure out how to be okay with what happened to me as a child, so they won't feel imprisoned from my stuff. They have to realize though, parents aren't normal we are flawed individuals even more so with what we have gone through. Crying is normal, but have a back up plan if you have a child you have to care for each day.