If you can't get your breathing calm and steady using your own techniques...here are some videos to guide you.:)
Three Minute Mindfulness Meditation Video
https://www.youtube.com/watch?v=cDflnqo0TQs
12 Minute Meditation Focused on Relieving Physical Symptoms
https://www.youtube.com/watch?v=q2_UfFIszkY
S.C.