infertility, man and women

Medical professionals can contribute to some infertility unknowly sometimes, for example in my case, when i was pregnant some years back. I woke up one day bleeding, i went to see a qualified doctor who precribed  an injection for me, mistakely he precribed the wrong injection, as both has similar name but different functions. After having the injection my period just stopped for 2yrs. It  was later i discovered the mistake and started treament to induced my period. But i had to wait for 2 yrs before i could get pregnant.