How much can a mood change in an afternoon?

In the space of an afternoon my mood has plummeted. I am sick of this crap, I am feeling so trapped by what my body can't do.

I'm also fucking pissed off with how long it is taking for a hospital appointment to come through, at least if I had that it would be something for me to focus on. Instead, I am living from one bad mood to the next, feeling bright for about a week and a half and then going back to feeling like shit. I wish that I could think about something else, I wish I had more in my life than the desire for a family, I wish I could give this crap up.

When I was feeling quite positive I did start to think that I could cope with this if it wasn't meant to be for us however, deep down I really don't know whether I could. Every sodding month would just be a reminder of how much of a failure I am. I am so angry at everybody that manages this. I'm obsessed with everybody that manages this. I'm just so ANGRY. Angry that my life and marriage has become this one big issue.

I'm really trying to focus on other things and the weight loss is definitely helping. I'm glad that I am finally getting a grip on that but really, what else is there to focus on when your whole future life and plans are balancing on something which is so unachievable?

The reason for this mood - my period of course. On CD 22 I start to bleed, CD bloody 22. Why not just be done with it and give me one permanent period.