Day and night confusion

Anyone else? My daughter will be 2 weeks old Wednesday. Since the day I brought her home our nights have been HELL. She sleeps 3-4 hours at a time during the day and I can’t get her to stay awake. Then between the hours of 9pm-4am she’s an absolute terror and I feel bad saying that. Nothing will soothe her. She just cries and cries and cries for 6-8 hours even if I’m holding her. I really think it’s day and night confusion with a mixture of colic. I’m in the process of trying to switch her days right now. Man am I tired. I’m pretty sure I’m suffering from PPD too. No I don’t have thoughts of hurting her, not at all. But I do cry. Multiple times per day every day. And I’ve had thoughts of hurting myself. I have an appointment with a therapist on Friday. Does anyone have any advice or tricks or something? Obviously this is my first baby. And will be my only baby.