Sudden increase in movement

Nicole
So yesterday my baby was calm but fairly normal in movement pattern. Today he has been moving almost non stop and not all little movements either. I'm 33 weeks. Was wondering if anyone has experienced this or not either currently or a previous pregnancy and if I should be worried or not. He's been moving at times during the day when he usually moves in addition to new times when he is usually quiet. 
I did call maternity and they said I shouldn't worry too much about but it's so unusual and of course I read horror stories online so I'm still freaked out.