Increase in panic attacks. Advice please

Hi, I've just found this site from the Panic Attack site. I've been suffering from panic attacks since about 1994. I've been on fluvoxamine and valium (still take valium in emergencies), but came off the fluvoxamine a few years ago. However, I find that the attacks are on the increase. For example, I was recently in Hungary, a city I know well, and started walking across a bridge quite happily, and then absolutely froze! I don't know how the hell I got off the bridge, although I was seriously thinking about jumping over it.
When I got back home, I went to my normal tube station, waited for a train, and had the stupidest urge to chuck myself on the tracks, and now I'm getting panic attacks every time I go near my tube stations. I know the fact that the fact that I know that these thoughts are irrational even whilst I'm having the attacks, but it doesn't get away from the fact that I'm walking to work half the time because I'm too scared to catch the (overline) tube. I'm still awaiting my anti-panic CD, but I'm getting fed up of being scared all the time. I also have these crazy thoughts about doing really stupid (and dangerous) things. It's been a long time since I experienced these attacks so badly and was hoping they were over, but can anyone offer some advice, please? I'm 42 and am going through the menopause. Thanks.