Treatment plan decided, nerves shattered

Was diagnosed with grade 3 invasive ductal carcinoma on jan 30, 

Finally got my treatmemt plan on friday, still awaiting chemo start date. i thought i would have felt less nervous once had that but omg im a nervous wreck. My appetite is almost non existant and i cant stop worrying,teary and shaking with nerves at times. 

Any advice would be appreciated.  All this waiting is definitely nerve racking.