dr said no more work for me till baby is here

I'm a little down I'm the dumps today.. ill be 35 weeks tom and my dr doesn't want me going back to work.. I work in a factory 12hour shifts over nights and days rotated I operate heavy machinery and climb on and off tractors in and out of my machines and it's all taking such a toll on my body.. I'm worried because it's a few weeks earlier then we expected and we didn't budget for this and there's a chance I won't get approved for short term disability.. I'm trying really hard not to stress but it's a financial burden I was scared was going to happen! Is anyone going threw anything