I wouldn't worry to much babe i went 2 c a midwife at 16 weeks and she struggled 2 find a heartbeat then i went to hospital at 18 weeks due 2 a water infection and they still struggled 2 find a heartbeat babe its just becasue the babys are so little it is very hard to find the heartbeat dont worry to much but if that scared then u could also go and buy a heartbeat monitor machine from mothercare u place it on ur belly and u can hear ur babys heartbeat i have one but its only very clear 2 hear the heartbeat from about 20 weeks.