Hi and welcome ,
As you have mentioned you have swallowed pills with out water and they seem to have strucked in the throat. i would like to tell to that since its been a long time ,water ingested and the salivary secretion should have dissolved the vitamins
supplements easily. I suspect you must have injured the esophageal mucous membrane
that is giving you a feeling of the tablet strucking in the throat.
Though i suggest you to have solid food stuffs like banana , a pile of rice to ingest forcibbly along the throat which may helps the pill to push down the throat and drink lot of water .
if this doesnt help , you need to consult a physician who can confirm it by clinical examination.