I agree with Caballo. And like Sara, hoping this is just a passing phase.
There are also lots of natural aides out there - like Bach flowers, or drinking St John´s Wort tea, that´ll help with these "bad" and suicidal times. Bach Flowers are INCREDIBLY amazing and will help almost right away.
You may have "pushed" the kundalini with the intensive Yoga course, so do a search. Ask the Yoga instructors for any help they may have to offer. Over-doing anything is usually not the right way....
Let´s hope some of these suggestions may help. Praying for protection for you on your journey. God bless!