Canker sore or Oral herpes??

My mom told me if I ever have had a canker sore that automatically means that I have mouth herpes? Is that true? I have three of these in my mouth right now but I couldn't get a picture of the third one. I'm 99% sure they are just canker sores. The last time I had canker sores was probably 1 year and a half ago. Or is it possible it can be herpes? And if that is the case then does that mean I can never give my boyfriend a blow job?