I was crestfallen to discover that I would never be able to have sex normally again (meaning without taking a drug), but it turned out to be a blessing in disguise.

Please remove spaces between words.
IwascrestfallentodiscoverthatIwouldneverbeabletohavesexnormallyagain(meaningwithouttakingadrug),butitturnedouttobeablessingindisguise.