We all fight the evil one in our lives.
What we really need is to become aware of all the times the Holy Spirit is with us.
One of my sons came to my house to fix something yesterday, and I totally credit it to the influence of the Holy Spirit. I think they (he and his wife) may have upset with me because I cannot go to their house as long as they have cats inside. I’m terribly allergic to cats — and it was allergies that threw me into my latest episode with atrial fibrilation. I was able to talk with him yesterday and hopefully explain it.
I am sorry to hear about your illness and I pray the Lord will help you with it either through doctors and medication (and maybe diet) and/or through direct Holy Spirit ministry.
I have cats and I have suffered from bouts of atrial fib in the past, but I don’t believe the two are connected in my case.