What to do about my sister and my daughter

I am truly distraught over this.
My daughter came to see me yesterday, with some complaints. Some are justified. She is fed up with me calling her when I am in an ambulance on my way to hospital. She says I am 'crying wolf' when there is nothing much wrong with me.

She also said I was a 'drug addict ' and that I needed therapy.

I know that she has been talking to my sister, because my sister has previously called me a drug addict and said that I need therapy.

I am convinced that my daughter is only repeating what my sister has told her.

For context: I accidentally overdosed on a prescription medication. That does not make me a drug addict.

I am furious with my sister for messing up my relationship with my daughter.

I am tempted to call my sister and have it out with her.

Any advice on this would be much appreciated.