Feeling like moving on boat sensation.

Hi Dr, Last 1year back i use to travel morethan 14hrs,after reaching destination i wont feel like any moving sensation but from last 6months  i have some feeling like moving on boat sensation without travel, recently i travelled 10hrs after reaching destination my body feeling like not in my control feeling is so bad. And i also i have pain at upper part of neck,full head pressure on back side and when i bending down my head it feels like falling down and same like moving head on left and right but when i was walking with head straight or facing up not feeling any and also if i move my eyes suddenly with head gets mild blur for point millisec and in dark places feels like dizzy. At present i am not using any medications. Pls suggests to overcome. And also i am planning to take covishield vaccine on next coming days is it safe to take