Dear rodrigo:
I think that you did well- and you state so yourself- playing that audio before going to sleep and NOTICING (you noticed, paid attention- this is what mindfulness is in practice) that your pain moved away from your chest area and you felt better. Regarding the images of her being with another man, images that pop into your head and cause you distress- just like you found something that worked for you that night and morning after find something that will work regarding those images. Accept/ not resist–> then let go. Repeat to yourself certain thoughts when you see the image, a thought that is true and that will make you feel better…?

How are you doing today?

Take care:
anita