Very good news hearing you are not facing any serious medical problems.
Pieman, "goggle" lump in the throat...there are all kinds of reasons for it. Dry throat, allergies, stomach upsets...but a lot of times, it is nerves, anxiety and worry that can constrict the muscles around the neck and cause a sensation of tightness.
Often, MD's here will give out a benzodiazepine such as Xanax or Klonipin to make the patient more relaxed, ergo, easier to swallow and no lump in the throat. These Rx's though can be addicting, as they are mild sedatives and psychotropic medications, so MD's try to limit the length of time a patient remains on such Rx.
But if all else fails, you may ask your MD if she thinks this may have an anxiety basis and what kind of benzodiazepene Rx may be of help.
Often, just yawning, strecthing, walking, medidation, physical activity like jogging can help relief stress and such sensations as lumps in the throat and hard to swallow.
These complaints are very common, so you are not alone in them.
It is always imperative, however, if the sensation worsens or does not improve with conservative measures to seek a second medical opinion.