Hi Kaika,
Are you seeing a therapist? they could help you with ways to deal with the stress, it's hard not to SI when you are stressed if you have used that as a coping mechanism - (and I have too) you say you dont know what the trigger was - thats ok - in time you will be able to recognise it - something just clicks and you go - uhuh thats it! - thats what happend for me
I am sorry you are feeling so stressed and hope that you are feeling better soon - please take care and be kind to yourself P7
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Its not how many times you fall down that counts 
its how many times you get back up! 
(Thanks to fenrir for my Picture 
)
When you have come to the edge of all light that you know and are about to drop off into the darkness of the unknown,
Faith is knowing One of two things will happen: There will be something solid to stand on or you will be taught to fly.
by Patrick Overton, author and poet