[karan new delhi]

hi guys m karan from new delhi india ,10 days back i was on a vaction with my family to goa , so i went for swimming in the hotel pool and accidentally hit my head to the side concrete while back rowing , i was totally fy9 at that moment and the following 2 days , the 3 day i started feeling dizzy while i was walking.. i got a ct scan when i came back from my holiday it was clear , doctor gave me medicine for my dizziness ..my dizzyness has been reduced , but pls tell me can concussion symptoms come after 1 or 2 days after being hit