All I can add to this is, a number of years ago I was on a anti histamine tablet from the doctor for about 3 years called Citirizine which he prescribed to me for sinus problems and headaches! I noticed that it also helped reduce my anxiety.
However, when I moved house and went to a new GP he wasnt too happy that I was taking this constantly. Again it had became another crutch that I was using and I was scared to come off. But Ive been completely off for about 18 months and havent noticed any rise in anxiety. Headache and sinus problems also have vanished!
Water - I totally agree, drink loads, then loads more..................
I agree with lindalou on the cold & cough remedies , if you are on certain types of anti depressant then certain well known remedies should be avoided - always check with you chemist or doctor on this one.
Glad its helping you though Mirry, keep us posted