help help help

Sometimes when i duckdive it feels like the board is hitting rocks but i know there aren't rocks where i surf.?
do you think the board is hitting the bottom? im worried that im going to damage my board! what could this be?
also, any tips for intermediate surfer..can paddle out back, catch green waves..wanting to get into comps?
thanks a lot!!

do you think the board is hitting the bottom? im worried that im going to damage my board! what could this be?
also, any tips for intermediate surfer..can paddle out back, catch green waves..wanting to get into comps?
thanks a lot!!

