H.,
First of all, I want to commend you for bringing this up. I am so sorry for all that you are going through. I learned something very interesting about stressful events in a person's life. When you relive thoughts or memories of a certain event in your life over and over again, it actually creates a pathway in your brain. It is like a trail through a forest - the more often it gets walked on, the more distinct it becomes. The more you think about a certain event or relive memories or thoughts, the more easily your brain to automatically kicks into that pathway whenever something comes up that triggers that memory. So in this case, when you start to feel the stress of your relationship with your daughter, your brain automatically takes you down the pathway of reliving those thoughts and feelings from your PPD. This doesn't mean that you are falling back into depression or that you are dangerous to your family. I would suspect that you would probably never hurt your daughter even if you never did anything else about how you are feeling. However, why live that way when you can get help? Just like replanting pathways through wild areas, your brain can be healed and retrained.
Beating yourself up about random thoughts floating through your head can only be adding to your stress. I have not dealt with PPD, but I have had scary, violent thoughts about my children before, especially when I am stressed and frustrated. I think most moms have these thoughts, they are just too afraid to admit them. The few good, deep, honest friends I have all admit to having the same kind of thoughts about their kids. It starts with the baby that won't stop screaming, and I would venture to guess that it continues throughout parenthood. The worst part about it, I think, is that instead of being able to bring these thoughts out into the open and realizing that they don't need to make us scared and ashamed, we mamas hide them in the dark, terrified of whether they make us bad people or what other moms would think of us if they knew. The truth is, things float through our heads. It's just human nature. I would question how you are reacting to them? Do you dwell on these thoughts? Do they become fantasies? Does thinking violent thoughts about your daughter thrill or satisfy you? It sounds like the answers to all of these are no.
If you're asking if something is wrong with you, I would guess no. However, if you feel like this is affecting your quality of life, or the quality of your relationship with your daughter (and it sounds like it is), now might be a good time to seek some help. Sometimes what you really need is a counselor who can help you talk through what has happened and see the connections. I would start by checking on what mental health benefits are available through your insurance. I was surprised to find that a counselor was fully covered by our insurance, even though I assumed we would have to pay it all out of pocket. If that doesn't work and you can't afford out of pocket, start searching for some other routes. Do you have a church or a place of worship that provides counseling? Many pastors are trained in counseling. You can always ask what kind of training/experience your pastor has. There are also resources available through the city for mental health counselors. Check out the government pages or call your local city office/city hall and ask what is available.
I think the key here is to look for help. You don't have to live with the guilt. You haven't done anything wrong. It's not your fault that you have suffered from depression. You are not a bad person or a baby mom. The fact that you are trying to get help, to improve your relationship with your daughter makes me think that you are, in fact, a very good mother. A bad mother wouldn't care about her relationship with her little girl. I am willing to bet that you can get past the fear, guilt and pain with just a little help. I have some friends who are professional counselors, so if you want to privately email me and tell me where you are located, they might be able to point you in the right direction for finding someone who can help. God bless you and your family.
Best of luck,
S. L