Heavy metal toxicity. Too much. please?

I have symptoms like, tingling feet, fatigue, knee pain. I used to eat lot of clay due to pica. For 4 years I had eaten, ash, clay etc. My mbbs friend told it could be heavy metal toxicity. Please help I don't know what to do. Since childhood I have undergone so many surgeries. I had so many health issues. I really can't bear more. I've already become so weak. I never had healthy days for even a month. Some or the other sufferings. Please suggest what to do. Or if any natural way of detox is possible too etc. I can't take any risks. I've family problems & lot of responsibilities. My aunts with Schizophrenia & dementia are completely dependent on me. I hope I'll be safe. I don't want to die so young. Please suggest 😭😭😭I'm suffering too much. Please