A question about immunity and the human body... doctors, plz help!!!?

Once you get immune to a certain anti-biotic (like me to amoxiccilin).... can you recover? or is that it? no more of this antibiotic for the rest of my life...
Update: hmm yea sorry, that was what i meant, amoxxicilin no longer heals my infections, the doc says that the bacteria inside me has got resistant to that specefic anti-biotic...

so what i want to know is that now i can use this antibiotic anymore? and can my body recover from this?

thanks
Update 2: mean i cant use this anti-biotic anymore for the rest of my life?
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