It's definitely important to try to manage your OCD as best you can, generally speaking of course, but even more so with baby coming. Being a new Mom with an infant, you're going to be triggered a LOT more. Babies are stressful without having an anxious disorder, so you can imagine the stress when you deal with anxiety!
While I'm all for whatever treatment approach works for a person, sometimes. it's important to reevaluate what we're doing, and if it isn't properly managing our conditions, it's time for a new plan. If your OCD was much better managed with meds, that may be something you may want to consider again. If your therapist doesn't specialize in CBT or cognitive behavioral therapy, you may want to look into one that does. CBT is a fantastic therapy approach for anxiety and OCD.
Congrats on the baby btw! ENJOY your last few days of peace and quiet before life as you know it is FOREVER changed (lol).
Please visit our OCD forum too, the community leader there, JGF is awesome at giving people suggestions on how to manage the cycle of thinking. She has a great thread there titled "Anatomy of a Horrific Thought". Check that out too.
Keep in touch, let us know how you're doing!