Begin by seasoning the chicken breasts with salt, pepper, and half of the dried thyme and oregano on both sides.
In a large skillet, heat the olive oil over medium heat.
Add the seasoned chicken breasts and cook for about 6-7 minutes on each side, or until the chicken is golden brown and cooked through. Remove the chicken from the skillet and set aside.
In the same skillet, add the sliced mushrooms. Sauté for 5-6 minutes until they are golden and have released their moisture.
Add the minced garlic to the skillet and cook for an additional 1-2 minutes, or until fragrant.
Pour in the chicken broth and scrape up any brown bits from the bottom of the skillet.
Reduce the heat to low and stir in the heavy cream, remaining thyme, and oregano. Let the sauce simmer for about 3-4 minutes until it thickens slightly.
Return the chicken to the skillet and coat it in the creamy sauce. Allow it to simmer for an additional 2-3 minutes to heat through.
Taste and adjust the seasoning with more salt and pepper if needed.
Serve the creamy garlic mushroom chicken hot, garnished with freshly chopped parsley for added flavor.