definitely mention it to your doc, if you are taking the stuff and it is having no effect by then.
are you seeing any sort of therapist?
i get agoraphobic to the point that i can not even consider going in a store or sit in a car lol. klonopin smashed the feeling, it was great, but it did come back, and i did start drinking, annnd that lead to my quitting drinking, heh but, i felt i had to hurt as many people as i could emotionally before stopping.
the feeling of agoraphobia left, but i still had a lot of rewiring to do lol.
idk, for me while that fear is happening, while im in public in that state there is a lot going through my mind - and i do not like most of it, or agree, but its there, the thoughts and the overwhelming feelings they bring. do you know what im talking about? do you have a way to gather, sort, process, manage and separate your thoughts and feelings during a moment like that?
your doc probably is expecting to raise your dose

but you should really see some one also. understanding what is happening is important, the valium should only aid in allowing the space or time to take every thing in around you at a reasonable rate. hopefully some sort of therapy could be arranged if you arent going already, you can decide who you want to see, it can become entertaining meeting and 'interviewing' therapists, counselors, and psychologists. everyone of them has a quirk, specialty, or selling point, same as you and i.
everyone else goes about in this world, but they are in their own world, and their own lives, and pains, things they do to bring them happiness. it can be hard to tolerate everyday, and everyone, or even yourself - but you can - and its best to understand yourself, before shutting yourself off from
yourself even, with drugs.