I would want to know why you have chosen to use drugs at such young age and what do you get out of using drugs?
Just asking so I could raise my children to be able to resist the urge to use drugs and atleast wait until their brains have fully developed so they won't end up living their whole lives with the same or worse emotional and cognitive capacity as while in their teens.
It is pretty much the biggest issue when starting to use drugs at young age as even getting drunk few times a month will stop the normal development of brain and if continued until the age of about 25 years old it can't be reversed anymore.
Also as brains are developing very rapidly while being teenager the use of drugs will lead brain's reward system to malfunction for a whole lifetime as any achievement won't cause pleasure and drugs (and pain from self mutilation) are pretty much the only way to feel something.
Grab your shit together and stop using atleast for ten years and achieve something before you waste your life. You will have plenty of time messing up with drugs after you have grown up (trust me I know atleast that

).
Get help now if needed as pretty much everything you need in order to stop using (atleast in civilized countries) are covered for you while being underage but you'll pay a hefty price for detoxing and rehabs after you aren't minor anymore.
Take some time thinking about it and do your biggest choice in your life until now.