Dreading going back to work...

FTM and my LO is only a week old but I already am finding myself crying at least twice a day thinking about when have to go back to work at the end of March. I only get 12 weeks of unpaid leave and one week was spent before I delivered. How am I supposed to leave him? I can barely stand not being in the same room as him. I talked (read: cried) to my husband about it last night and I know he feels guilty that he doesn't make enough money for me to be a SAHM; he's a high school English teacher (and we're in Mississippi). I make less than he does as a master's level therapist and LPC which is absurd and makes me feel like my 28k salary is worthless in comparison to time raising my son. He suggested he could pick up a second job but then I'd never see him! I'm anxious and at a loss...praying something comes along to work things out.