Oh Irene :( I'm so sorry things are this bad for you right now, please do seek out some sort of professional support to help you with what you're going through and the reasons behind the drug use, and to help you reduce the usage as overdosing is so dangerous.
Please get some help and support for this. Maybe make an appointment with your doctor? That way you can discuss the heroin as well as risk of STIs and the issue with your leg as well.
xx
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