Creche stress - a final update, after which I will shut the fuck up about this

So the creche have a space for us if we want it. With a woman who once assured me that it was okay that a baby was screaming his lungs out "because he's learning to communicate." To which I thought "It's not communication if he gets no response," but I'm sure she did pick him up soon after that. I spoke to one of the other minders about this today, and she said she must have been having a bad day, because she's - in her opinion - very warm and friendly with the children.
On the plus side: she's a bit older, has tons of experience, seems very well liked by her charges, and she's the devil I know. I asked Marie what she thought (because she is the only one of us who knows this woman really), and she said this lady is very nice and will take care of our baby very well. What does she know - she's two. She also added, thoughtfully, and after a long pause, "But the baby will cry, because he will want to be with his mummy instead." (I'm now also looking for a good surgeon to take this dagger out of my heart.)
The thing is - I feel like I need someone to help me out. I think the main reason I'm trying to find fault with this creche and this person is because I feel guilty for leaving a six month old with a stranger in the first place. I feel like I should look after my child all by myself, all the time. At least for the first year. What kind of a mother am I that I will let a tiny boy be without his family and one-to-one attention in the first year of his life?
I think I'd make less of an issue of it if we had the British system with one childminder for every three children (I think that's what they do). We tend to have one to every seven. I have to remember that I wouldn't be able to do this at all if we were in Britain, though, because I couldn't afford to.
Anyway - I think I will go and make amends with the management, gracefully accept the place, have a chat with this woman, and then I will see how I feel in February. If it doesn't feel right in any way, I can still just not use the place. I don't think I would be depriving anyone else, as I've asked for two short days a week and I think they're fitting me in around the other (full-time) babies.
I should also remember that so far these worries are all just thoughts in my head. I was the same with the previous two, and in both cases I think I made more of a thing of it than they ever did. Two short days a week is not that much, and most of it will be taken up with eating and sleeping. Also I do turn into the mother from hell if I haven't exercised enough or had any time to myself. (I'm just looking for reasons to absolve myself now.)
Right. Sorry to obsess about this. I needed to vent. I will now try to keep these worries to myself until February. At which point I will probably have another breakdown.