Mom took first diabetes medication and died in front of me

I don’t understand. I don’t know what the point of my post is… mom is gone. But I guess I need closure and I haven’t been able to find answers for her death. I feel like I’m scared for whatever reason.

Mom had rapid heartbeats for twelve days whenever she tried to walk. Me and her ,we thought that was due to obesity…

She saw a cardiologist and he gave her medication. He requested blood tests and she did these test but postponed them to the following week.

The test results were out, She knew she had high blood pressure but she didn’t know she had diabetes as well. HbA1c was 9.1

We only had each other but mom told me it was my fault she got it. She told me if it weren’t for the stress I’ve caused she would have been feeling well.

She couldn’t walk after that so I brought her a diabetes doctor. She wrote her a prescription, it was a medication and not an insulin shot . Her blood sugar while fasting was 380 … oxygen was 92

The medication was a pill galvus met 1000 /50ml One pill each 12 hours. And a ringers injection that she gave her

Mom took one pill then I gave her some food to eat then she told me she felt really unwell then after 12 hours I gave her the second pill and she went to sleep then she woke up to go to the bathroom. And couldn’t get up. I went and got her out and let her sit on a chair that I brought to her. She said her heartbeats were rapid, her nose began turning blue then her heart stopped. She looked at me then died. I keep thinking about that day and what went wrong… Was it the medication? Since she had been unwell but alive… or was it her heart? Since she had issues. Or was it a stroke? I really don’t know….

I can’t help but feel super guilty about following the medication. I trusted the doctor . She didn’t say anything about hospitalization… and she sent me a message later blaming me for not calling her to ask for an ambulance….

I thought that was her role … and she told me she was going to be well. I don’t know whose fault it was. All I know is I could’ve done more or bought that meter… life is not the same and it’s been 4 months