yes it is normal to be killed more than u kill, and yes most of ur kills usually come from knifes if u r doing serious knifing. as u get better u should start to get more meds saves than deaths but that wont happen all the time
all of us have our bad games. and just remember that ur medding and u'll get killed lots so dont get too pissed lol. btw, the rule a lot of meds go by is: med first then kill
good luck with your meding career