Feeling Guilty

So I'm having to go back to work sooner than expected, I've been going to multiple interviews and having to leave my 4 week old with a very good friend/church mentor. I know she's in very good hands (the lady has 12 adopted children and has more adopted children that have already left the house) but I hate being away from her at 4 weeks. Is it bad to feel so guilty about leaving her. I feel like I have failed because unexpected bills have came up and also her formula is ungodly expensive and I wasnt ready for any of it.