Laying my Mother to rest.

my mother Of the young age of 52 unexpectedly passed away this morning. she has COPD, some times he has flare ups but I'm the last 7 years she has not had many at all. last night she used her breathing treatment and the medicine that is supposed to give the oxygen more healing properties. I told my mom to stay down stairs so I could be close, 4am my wife woke up to my mom talking, noticed she was talking to herself, I called out to her 5/7 times and with my mom's genuine face she told me she was fine, 1 hour later she fell off the chair, we called 911 immediately they told us to count her breathing and she only inhalded two last times and twitched I did CPR for 7 minutes. the emts did not take her to the hospital the continued with only CPR machine for 25 minutes. she has to much fluid in her lungs she downed and wasn't getting enough oxygen to her brain reason for the 4am situation, I just lost my mom. I have no dad, my kids have no other grandparent. and they loved her more then you could ever know. please help us in this time of need I am completely lost. I lost the one person I I could vent too and besr the truth.