Well i went this morning, and had a good chat with my gp. We discussed how i'd been getting on the last month, and i explained that the anxiety and ibs was having a major negative effect on my life in general ( with both relationships with my family and girlfriend being strained to the max). She was very sympathetic.
We discussed the a-d route and decided the best one to try 1st was Fluoxetine (Prozac). I did mention Amitriptyline (Elavil) but she advised that as it was an older a-d it was more suited to depression than anxiety, and there was a greater chance of side effects. She did leave the decision to me finally, so i thought best to trust her medical opinion.
Shes also refering me to a counselor, which knowing what the nhs is like might take a while, but might aswell get the ball rolling.
I've just gotta try it, and fingers crossed find the strength to cope with the side effects (if i get any!).