Well its probably pretty normal
im a female and for the 3 years I have been with my guy I have never had an orgasim while having sex, only when he goes down on me, but I think its normal so keep it kool,

It's normal. My guy couldnt at the beginning too for about a few months.

Did you mean that u have had sex with ur gf for 9 months and u used to be able to?

Oh in that case, I dont know for sure, but maybe u should try other positions, changing positions during sex stimulate other spots...Or have ur gf give u a hand job before having intercourse, just dont bring it to "cant hold it" stage.