The constant urge to swallow or clear your throat, the sensation of something choking you, and the fear/panic at night can be features of "globus sensation," which is often linked to acid reflux (LPR), anxiety, or throat irritation - frequently a combination of these. The fact that there is no real difficulty swallowing food, and that it is closely tied to fear and panic, points more towards this than a mechanical blockage, but it does need an in-person examination to be sure.
Next Steps
I would suggest an ENT consultation for a throat examination (a laryngoscopy can directly assess the throat). Because the anxiety and "panic jerks" at night are prominent, evaluation by a physician for reflux and, if appropriate, support for anxiety would help address both aspects of this.
Health Tips
Try not to focus on swallowing, as that tends to worsen globus sensation. Avoid late meals, caffeine and smoking if applicable. Please seek timely help, especially given the distressing nighttime fear.