I actually just read a book called The Other Side of Normal, in which there is an entire chapter dedicated to anxiety. There have been studies that show that after a mother gives birth, the part of the brain that inhibits excessive worrying is lessened. From an evolutionary standpoint, it was so that the mother could be more attuned to her babies cries and be there to meet its needs. However, mothers who are predisposed to anxiety and depression often find that the worrying becomes excessive and symptoms can very much mimic OCD symptoms. I think you should take a look at how much this is interfering with you quality of life. If u are concerned, I would speak to your doctor about it because none of us here can diagnose you. The book is by Jordan Smoller. Very interesting book