Shannen Doherty is scared as she prepares for the “unknown” of a new round of chemotherapy. The 53-year-old star has opened up on her treatment for stage 4 breast cancer, and she admitted it feels “very real” as she finds herself not knowing “if it’s gonna be three months” or something more. Speaking on her own ‘Let’s Be Clear’ podcast, she said: “It becomes very real in an incredibly different way, because I have no idea how long I’m gonna be on the chemo for. “I have no idea if it’s gonna be 3 months or if it’s gonna be 6 months or if we’re gonna — if after 3 months, it’s not working, if we’…