Hi. I am sorry that you have to face such hardships at such an young age. From what you have mentioned, it seems you are in depression and since you are having suicidal thoughts, it becomes alarming. I am not sure about what tablets you are talking about, but if they are habit forming, it will further worsen your situation
Next Steps
Talk to your parents and seek psychiatric help both for depression and addiction. Consider getting admitted for few days.
Health Tips
Don't delay treatment and seek help as soon as possible. Your problem can be managed with proper medications and counseling.