Have put on over a stone in just over a month -it is frightening ...

Have put on over a stone in just over a month -it is frightening even the shape of my thighs has changed. I walk two large dogs, twice a day and eat healthily. I am vegetarian. Bleeding is under control now but I can't fit into any of my clothes, I am starting to look very frumpy. Is it worth it? I know if I mention it to my doctor next week she will try to persuade me to leave it a little longer, but just how heavy am I going to be in another month?