You haven't heard anything for weeks
What this usually means
Silence in the first few weeks after a referral is normal. Your referral is usually sitting in an administrative queue, waiting to be triaged by a consultant or specialist nurse. No news is rarely bad news at this stage — it almost never means your referral was lost.
What usually helps
After about 3 weeks for a routine referral with no acknowledgement, a polite call to the GP surgery (to confirm it was sent) or to the hospital booking team (to confirm it was received) usually resolves the silence.