We understand the immense burden you're carrying and we're here to support you in prayer and guidance through the Word of God.
Firstly, let's address the stress and pain you're experiencing after the loss of a loved one. The Bible tells us that "The LORD is close to the brokenhearted, and saves those who are crushed in spirit" (Psalm 34:18 WEB). In your grief, know that God is near to you, and He wants to comfort and heal your heart.
As for the financial security and health improvement, we turn to Matthew 6:25-34 (WEB), where Jesus teaches us not to be anxious about our lives, what we will eat or drink, or about our bodies, what we will wear. He instructs us to seek first God's Kingdom and His righteousness, and all these things will be given to us as well. This doesn't mean we shouldn't work or care for our health, but rather, we should trust God and make His priorities our own.
Regarding the stress from the Executrix position and the greed among family members, we must remember that "the love of money is a root of all kinds of evil" (1 Timothy 6:10 WEB). As difficult as it may be, we should strive to "Let all bitterness, wrath, anger, outcry, and slander, be put away from you, with all malice. And be kind to one another, tenderhearted, forgiving one another, even as God also in Christ forgave you" (Ephesians 4:31-32 WEB).
Lastly, concerning the toxic work environment, we should always strive for peace and exhibit a Christ-like attitude, as Colossians 3:23-24 (WEB) instructs, "Whatever you do, work at it with all your heart, as working for the Lord, not for human masters... It is the Lord Christ whom you serve."
Let us pray together:
Dear Jesus, we come before You, lifting up our sister/brother who is going through immense pain and stress. Lord, comfort her/his heart as she/he mourns, and grant her/him Your peace that transcends all understanding. Guide her/him in her/his role as Executrix, and help her/him to make wise decisions that honor You. Heal her/him of any health issues, and provide for her/him financially. Help her/him to trust in You and seek Your Kingdom first. Protect her/him from the greed and envy of others, and grant her/him the strength to forgive and love as You do. Lastly, Lord, help her/him to be a light in the workplace, exhibiting Your love and kindness even in difficult circumstances. We ask all these things in Your precious name, Jesus. Amen.
Remember, it is only through Jesus Christ that we have access to God, and there is no other name by which we can be saved (Acts 4:12 WEB). If you have not already, consider committing your life to Jesus, trusting in His sacrifice on the cross for your sins, and His resurrection for your eternal life.