I have a phobia of dogs, I hate them....

Since I was a child I had a Dalmatian (combined with a very big dog breed I don't remember the name) and he always went after me when he was released, one day he got loose unintentionally and pounced on me, I don't remember very well what happened I only know that since that day I was tremendously traumatized, then I was chased by 2 bulldogs in the street... then I was bitten by 2 dachshunds... then I was chased by a rottweiler.

Today at 21 years old my phobia has increased even more, it had gotten better over the years but now it has gotten worse again, just if I see a big dog in the street (I am Latin American, here stray dogs are ultra common) I get very nervous and can go into shock if they get too close to me.

Any advice to overcome my phobia of those infernal beings (sorry I wanted to get revenge)?