Do a search on the forum for saddle fitting and cut-out test. Terry makes several different saddles of different sizes, and the Brooks is a completely different size and shape from anything Terry makes. In particular, Terry saddles tend to be very pear-shaped. If a Brooks fit you well before, you might want to look at some of the wider Specialized saddles - although their firmer saddles only go up to 155 mm, which may be too narrow for you. A Selle Italia Turbomatic Gel Flow might be an option too (I'm seriously coveting that saddle).
Is your doctor a cyclist? I'm skeptical that a cut-out would alleviate pulling, in any case. (I'm sorry that happened to you, it sounds EXTREMELY painful!
) Much in the same way that a donut cushion can actually exacerbate pressure on a bruised tailbone or hemorrhoids by pulling the tissue tight away from the anus - the purpose of a saddle cut-out is to reduce pressure on the central area (external labia and clitoris, for women) by distributing it more towards the sides. Most Terry saddles are also pretty squishy, which could exacerbate both pressure and pulling.
Speed comes from what you put behind you. - Judi Ketteler