Thank you for posting your query at DoctorSpring.com
You are suffering from feeling of lump in throat.
Most likely you are suffering from acid reflux (gastroesophageal reflux disease/GERD). Acid reflux causes oedema and swelling of mucosa of throat which will cause foreign body or sticky sensation in throat.
Stress and junk food/smoking/ alcohol consumtion/spicy food causes acid reflux.
Still to confirm the diagnosis one endoscopy of throat (laryngeal endoscopy) can be done. You can do one ultrasonography(USG) to rule out any significant swelling.
For reflux you can start following medication-
Tab. Rabeprazole 20 mg once in morning before breakfast for 3 months.
You need life style changes to get permanent relief incluing-
Avoid spicy food/ fast food
Avoid smoking/ alcohol consumtion
avoid excessive tea/coffee
Drink plenty of water
Hope it helps, feel free to ask further queries