according to your age you are adult to choose everything related to your mind body and soul but i feel this very important to discuss with you the harmful effects of your overdosing of medicines.
Basically every medicine we use daily is a concentrate of special chemical substances which are required in our body in only small portions and if we use them excessively then we suffer from adverse effects.
I would like to know some question in more detail so that i can help you in managing your issues. Mostly when i encounter the patient like you i offer them a separate session with me where i can discuss with them in detail regarding following issues:
1. why are you overdosing?
2. When you first started this in your life time?
3. How do you feel when you have overdosed yourself?
4. What symptoms are you having at present?
5. Are you mentally disturbed or its just a habbit that you overdose?
6. Will having a psychological support will benefit you in managing your possibility of next attempt of overdosing?

I personally think that you are aware of this fact that the overdosing is harmful for you but still you are doing it is because you are unable to sort out anything which you want to be sorted out and this is a positive aspect that you discussed this issue here because you want to feel relieved.If you could share with me the details of everything behind your this action of overdosing then we can discuss and come to a conclusion which can be beneficial for you.
The most important thing is that you should consult a doctor urgently so that the medicine can be flushed out of your system so that your liver, kidneys or brain are not damaged. Please get your treatment done and then we can discuss the management with you. I hope you will understand and see the doctor soon. Get well soon :-)