Hi- leaving your newborn with anyone is so hard <hugs> to you while you find he best option for your family! I know the stories that we hear in the media are awfull... but know that there are so many people out there that are angels and so loving! I was a nanny fom high school graduation till the day before I had my first child, and to be the honest I really miss it!
When you think about someone else "being mommy" during the day think about the other option... someone just watching. A great caregiver is going to love on your baby and he will be happy to be with them, sometimes sad to leave... thats a good thing because you know they are happy there! Just like when you or dad leave. Someone that is really loving on him is going to soothe him possbily like you would rather then having to let him cry it out. You can find this person in any setting- centers, in-home, nannies, or even your neibor! It's just finding it!
I'm in the process of trying to find someone to watch my little boy just one day a week... and that's what I'm trying to find, someone that's really going to love on him- not just watch him. I teach childbirth & breastfeeding classes and do labor doula support- so needless to say I love babies! :)
I wish you the best in finding the right place for your little bundle!