webjen, don't be discouraged!! You see so many mothers support you!
Comparing to most bf mothers, I am a very lucky one with support from the whole family. Though my 99 supports bf, she used to query about my milk supply at the very first month every time when my baby cried and asked me to supplement with formula (of course I didn't). However, I proved to her that I have enough milk supply for my baby and he is now a very strong, active and healthy baby.
So keep it up and they will see the long term benefits of bf in future.