Anxiety surrounding health incident

Recently my healthy husband had cardiac arrest while we were sleeping. I awoke to find him in distress, called 9-1-1 and ran next door to get a neighbor before we began CPR. He had no pulse for eight minutes, but because we began CPR immediately we saved his life. He is now back from the hospital and slowly recovering with rehab. My question surrounds this incident as I now have anxiety around this issue every evening and thinking what if? Also, we have three young girls who I have to think about all the time as well. I am usually very strong and it is hard for me to ask for help, but this has me in a bit of a rabbit hole.

My other question is regarding myself and needing to get away for a short time to take care of my mental health and feeling guilty about it as well as what my small community will think.