I thought my immune system was very strong so I was not worried.
Why do you feel that you have a very strong immune system?
I read it online. I was lucky that everything worked out.
I'm glad everything worked out for you, but it's not wise to get your medical information from the internet instead of listening to your doctor, because they're experts. I think in the future you should listen to what your doctor says, and not base your decisions around things you've read online.
It's my body. I make the decisions.
Just try to diversify where you get your information at. Your doctor is there to benefit you, and not believing what they tell you would be ignorant since they prepared for years to be in the position they are in.