I'm 14 years old and I've been with my girl for about a year, we attempted to have sex a few nights ago but I could only get a semi-hard erection. I don't get rock hard when I masturbate either, do I have a problem ? This is really embaressing.

Well first you shouldn't even be attempting sex at your age.

It is very possible you are simply feeling the pressure of your age. But the only way you can determine if there is a medical program is by discussing it with your physician.

Yes most likely just your age and not ready yet. And to be honest I doubt at 14, since it is not legal age to have sex in most places, a doctor would not treat you for it yet anyway.

I can only really echo. The problem is that you're trying to having sex much too young.