An audiologist is a professional who diagnoses and treats hearing problems.
That you are straining your voice when singing indicate that you are using incorrect vocal technique. The first step towards learning to sing with the correct vocal technique is to take face-to-face voice lessons from a qualify voice teacher. The teacher will listen to your singing and offer guidance and feedback about your vocal progress
Here are some tips about finding a voice teacher:
The teacher has an excellent ear, and carefully listens to, and gives you accurate feedback about your voice.
Has an understanding of vocal anatomy, including the respiratory muscles, the larynx and throat structures, and how they affect singing.
Allows you to tape record lessons or exercises in the lesson for take-home practice. Provides you with written exercises when needed.
Is professional in conduct yet personable. You should feel comfortable with this person. You should feel free to ask questions.
While being emotionally supportive, he or she should be able to challenge you to grow as a singer at the same time.
The teacher should be able to explain to you in depth why you are doing each exercise that he or she gives you.
If available go to a recital where this teacher's students are performing. If they mostly sound great then this is probably a very good indication of a competent voice teacher.
Avoid teachers who only take on students who are already professional vocalists. A good teacher can train any voice and would enjoy the challenge of doing so.
The teacher shows genuine interest in you as a singer.
The teacher understands vocal health issues including the need to drink water and monitor the speaking voice
Addresses the need to relax those tensions/muscles that can block good vocal production and vocal freedom.
Is emotionally stable and does not intimidate or talk down to you.
Your voice feels easier and more resonant when working together
I am a professional singer