My Wife Died, I’m Looking For Answers

Hello Reddit community. As title said, my wife suddenly passed away yesterday morning. She had some sort of a seizure which she didn’t recover from in emergency care. She had a history of liver cirrhosis and other related issues, but the death was very sudden and unsettling, to say the least. She wasn’t even nearly to be on a transplant list, that’s how “not bad” she was. Medical examiner said that they won’t do any additional investigations and that the body can be released to a funeral home. Funeral home of my choice picked up my wife, but now I think I want to do autopsy - I believe that the sudden death might be a doctor’s mistake. My wife took a new medication night before (Atorvastatin 20 mg, it has hepatic-related side effects and precautions ), and she also took a cough syrup (Dextromethorphan + Guaifenesin), which turned out to also have hepatic-related precautions which I learned from the internet, and the bottle didn’t say a THING about it. My wife always was a special in a way, would get rare side-effects on medications and had a complicated health history in overall.

With that back story, I have these questions:

1. Is this enough for me to require an autopsy?
2. Is autopsy possible after a body was picked up by funeral home?
3. How to arrange autopsy, will the hospital she passed away at help?
4. What might be my legal options against an individual who prescribed her Atorvastatin or against a drug store which brand the cough syrup was, if the report will say that those were the reasons?

Thank you, Reddit.