Your question is a bit vague. However, losing that much weight without any reasonable explanation is something you should absolutely speak to a doctor about.
Are you recently diagnosed? Do you test your blood sugar or have you had a recent a1c?
Lack of insulin can cause people to lose unhealthy weight and unexplained weight loss is a symptom that hints towards possibly having T1. Did your doctor perform any additional tests to confirm your diagnosis? The most common two are the C-Peptide and GAD Antibody tests.