I wouldn't say I suffered this severely but every month I get that sinking feeling about 5 days before I'm due. Feels like I've been crying for ages, really lethargic and have to force myself to do stuff. I know there are others who suffer much worse symptoms than this so I shouldn't really moan. But every month I have this low days when it all seems too much like hard work and then it dawns on me what it is. This in itself makes me feel a bit better cos I know it will pass but is there anuthing could I do to prevent it in the first place?