Seperation anxiety

I've had anxiety even before I was pregnant, and since having my son it's gotten so much worse. He is 2 months old. I go back to work tomorrow after being on maternity leave for 9.5 weeks. I find myself crying and have been for the past 2 weeks just thinking about going back. It physically hurts my chest when I'm away from him for more than 2 hours. My days usually consist of 8-10 work hours and I work at a pedatric office so I'll constantly be surrounded by babies that arent mine. And that stresses me out. Hes going to be home with his dad so it makes me feel a little better but I feel physically sick being away from him or even thinking about it. Anyone have any tips or things that could help me out? I need to have my job as it provides a huge chunk of income for my family and for our medical insurance.