Hey, rtms is a non-invasive brain modulation technique, and I do understand that you are worried that after 30 sessions rtms might have destroyed your sleep centre, but it doesn't happen usually, because the brain is stimulated, so it may alter the sleep functioning, but it is very temporary.
Initially, you can take help of medication, later on your sleep cycle will reset.
Next Steps
Do not worry, and please consult your psychiatrist once.