I need Postpartum ocd help??!?

I think I have postpartum ocd. I had a dream the day we brought our son home from the hospital that I was sitting on the couch hugging him with one arm and then when I looked in my other there was a knife. In the dream I screamed and threw the knife across the room and hugged my baby. Ever since that dream.. Actually NIGHTMARE, I have been an emotional wreck and have been noticing ocd symptoms in myself. I have always had minor ocd.. I think anyway. I count things touch things repeditly and I have also had some bad thoughts but I would always be able to tell myself they are just thoughts and I would never act on them and would be able to calm myself. And I have always had a fear of sleepwalking. I have never sleptwalk in my whole life but I heard some crazy stories about dangerous sleepwalking and the thought has always scared me to death. Especially after this dream. I'm now afraid I will sleep walk and hurt my baby. Every night before bed I hide the knives in a very hard to get place incase I sleepwalk.. I constantly check to make sure all the windows and doors are locked, I move objects infrom of my door blocking it so it would be hard for me to leave the room and also block the path to the kitchen in case I sleepwalk and try to get in there. I have also thrown out alot of sharp objects, sissors, pens, and so on. My husband won't let me throw out the knives or I would have by now. I DON't ever want to hurt my baby. I love him so much. I can't get over this dream I don't know why I had it. I replay it over and over and over in my head all day long. The thoughts are killing me! I saw a councelor who thinks it's def ocd but she's not much help. She just says slowly try to stop putting up barriors to the kitchen and stop hiding knives and says it's an irrational fear cause I have never been a sleepwalker. But still, I can't stop. I won't ever let anything hurt my baby so I don't know how to get over this fear and do what she tells me. HELP?!