Do u really think being on so many different pills is working?

for many years, on and off i took provera clomid and everything under the sun that a Dr prescribed. with NO results, just depression that i wasnt pregnant. finally! at 39yrs old im pregnant! why? what did i do different? i went to a fertility Dr and on my very first consultation put my foot down. i stopped listening & started talking. i told the Dr i want to get pregnant, im not taking ANY more pills. once the Dr HEARD i wasnt taking any more pills, he went a different way. my husband had to give me nightly injections and then the Dr did a procedure called IUI. i got pregnant on the first try! im writing this hoping i can give someone a voice not to give up but to try a different method or a different Dr. put faith in yourself & not the Dr. my Dr. is in new york city. if anyone would like his name plz reply. i will gladly give it. good luck & God bless. currently im 7months pregnant with twins.