nervous!!

Hi all... my name is Michelle... I am schedule to have surgery on the 29th of this month.... I'm so nervous about everything!! I haven't got my medical necessity letter because my doctor denied to me I change my doctor and hopefully he gives me the letter tomorrow =/ also. Medicaid doesn't covers the psych test and I have to go and pay 150$ out of pocket with a private doctor... I'm so worried my endurance won't accept the surgery... help!!