Does Constant Premenstrual Symptoms And Fluttering Movement In Stomach Indicate Menopause?

Hi. I have a question about a change in my pms symptoms. For the last few months I have been experiencing them for three weeks out of four instead of the usual weeks before my period. About three months ago I also suddenly went completely off chocolate which is very unusual as I was previously a complete chocoholic! I now have cravings for salad cream and pickles and rhubarb. I have felt a few fluttery movements in my stomach and I'm bloated. I know for a fact that I am not pregnant as I was sterilised five years ago, haven't missed a period and had a negative home pregnancy result, nor do I want another child so it can't be a phantom pregnancy. I was wondering if it could be the onset of the menopause? I am 37.