i have experienced something that sounds similar to what you describe but had difficulty pinpointing the cause (iodine overload, or kambo snorted into the nose or sublingualy) when you take kambo without putting it in the burns i find it consistently gives a very particular feeling along the surrounding meridians to the spot of intake (under tongue, in nose etc etc) it makes things feel dry and obstructed and itchy for weeks, lots of water can help this, possibly making burns without putting any kambo in them might help as the histamine and other chemicals surged to the area would help mobilize the obstruction.
i have not used kambo nasally in probably over a year or more, you could not offer me a sum of money large enough to try it again either.
i am pretty sure the burns and normal system acts to transform(and direct the flow of) the kambo compounds into safer more naturally assimilable compounds that the body can make use of.
when you intake kambo without burns it is active in an unhealthy way that drags on the system very heavily on many channels trying to integrate the compounds.
i would highly advise you place 1 drop each of the following essential oils on the center of the front of your throat in a circle maybe as big as your palm or so
lime oil
peppermint oil
star anise oil
you can use any 1 of these oils or any combination, i would say lime works best and probably even better when used with 1 drop of peppermint as well.
if you do not have any essential oils you can easily slice up a lime and put it in a glass of water and shake it and let it sit for half hour then apply this liquid to your front neck and gargle it as well, make sure you keep the peel in the water and slice it finely, you could even cut a lime in half and rub the exposed half to the center of your throat.
drink 8 glasses of water every day.
take beet root capsules, or beets, daily.
take milk thistle daily.
take B12, B9, B6 daily.
start monitoring your intake of the following chemicals and search up the content of each in your diet:
iodine
chloride
fluoride
bromide
adjust each individually in small amounts and see if it helps.
eating grapefruit everyday for a week or so should help considerably, also rub the exposed half of a fresh cut grapefruit against the painful point and gargle fresh squeezed grapefruit juice frequently, grapefruit essential oil combined with actual grapefruit would most likely work better than just 1 alone.
the grapefruit will likely solve the problem it is a very effective lymph stimulant.