A lump in throat sensation isn’t “normal” and should be thoroughly checked out with a nasal endoscopy examination. It sounds like you may already have had this done in the past if you have been told about an “inward facing epiglottis”.
We do see many people who present with similar symptoms like yours at our clinic. Many of them may have underlying conditions such as sinus infections or nasal allergy which leads to a drip of mucus from the nose flowing down and pooling in their throats, giving rise to a lump in throat sensation. We also call this “globus pharyngeus” in medical terms.
Other causes include acid reflux which can be treated with a course of medications.
It is important to get it checked out just in case there are more serious causes such as tumours or cysts growing inside the throat. Many people have so-called “inward facing”epiglottises and are not at all bothered by this so I am not sure I would be content to just leave it at that as the cause.
Take care and pls get it checked out properly soon.