We all go through such situations. I have several times. Majority are able to cope but some can't. Why is that? Well, bright individuals like yourself are sensitive to external stimuli and hence start to perseverate or dwell on unpleasant events. If thoughts are not reset by professional therapy, they can become unmanageable, which I know first hand.
CTB is not the solution to any negative life situation but CBT (Cognitive Behavioral Therapy) is. Please, get in touch with a therapist who specializes in suicide prevention and administers CBT, etc. What city are you in?
Meanwhile, this is what my therapist advised me to do when I had these impulses:
1.Speak to a mature, trustworthy friend/relative about your CTB plans. This will provide you with an outlet to lessen your burden.
2.Dip my face in ice water to shock primitive part of the brain.
3.Think of the devastation that my CTB would cause my loved ones. Suicide causes loss survivors to take their lives.
You also must talk to a psychiatrist who can prescribe meds to help your brain to reset.
Suicide is NEVER a solution. Biological death is a complex phenomenon. Science does NOT know if the transient pain that you are experiencing will go away after CTB.
Best wishes for a long and healthy life.