oh yeah i get that feeling sometimes. its not like you want to fail, but maybe delaying, procrastinating, getting up in partial... its more like SI, imo.
(you dont have to answer this, but it may help to know if it truly is suicidal ideation)
have you thought of a cause for it or is it more of something building up, was there an event? (reasons help to know)
do you think of recovery? or is there holding you from attempting? is it SI?
is there fear of death, hate for living, mental illnesses?
also remember that SI can be a lot of things, not just a subconscious response of your body like vomiting; they are usually mental to give fear to death or "love and will" to live.
hope this helps, also feel free to DM me!