Rebirth Route: Destroying My Ex and His Fake Sister

In my previous life, my boyfriend's adopted younger sister, Rita Wood, came to me at the hospital for a prescription because she had a sore throat. I asked her if she was allergic to any medication, and I even explained the dangers of being allergic to medication. She told me "no" very firmly. When I insisted on producing the informed consent form and having Rita sign it, she started a video call with my boyfriend, Ryan Wood, on the spot. On the screen, Ryan frowned at me before saying coldly, "I know Rita's health very well. She definitely doesn't have a history of allergens. She's my younger sister, so don't keep targeting her over the smallest reasons. I'm very busy, you know. Bye." So, I gave in and prescribed Rita the medication without undergoing the official process. Three days later, Rita showed signs of miscarriage due to her allergy toward the medication, leading to her being sent to an emergency treatment room. Apparently, she hid both her allergy to medication and her pregnancy from me. Thanks to her, I was held accountable for this incident, which led to me losing my chance to get promoted. At the same time, this incident got onto the news as a medical mishap. I ended up getting blacklisted by the medical world permanently. Not only that, but I had to pay off a huge debt. In order to clear the debt, I worked three jobs at the same time through day and night without resting. Finally, I collapsed and never got up ever again on a particularly exhausting night. When I open my eyes again, I've returned to the day Rita is here for a prescription.