Help just a tad confused

Sam
Im in need of some help i have made an appointment at a local clinic to have the nt screen down in a few weeks but my doctor also said i can do it at my local hospital. To do it at the clinic i have to get another blood test referral and have to pay almost $300 for it all but if i do it at the hospital i pay nothing and just do the blood test at the docs im confused at what to do and why my doctor gave me two options . I dont really want all the hassle of going to the clinic but then i dont wanna bee sitting around the hospital all day either