Hi,
Thanks for posting your query.
I do not think you need medications for this problem. However, it is becoming a disturbance to others. It is better to make an attempt and get rid of it.
You may speak to a speech therapist regarding this or simply speak to a
Psychiatrist about this.
You will soon learn to talk in a lower tone.
Finally, there is nothing abnormal with you. Some people normally talk loud.
Hope this helps.
Regards,