This is a really sucky situation... sorry you have these problems. I have PMDD and periods for me are horrible and can be painful and it's just so tough to deal with. It'd be a good idea to see your OBGYN if you can and ask for advice. Or a GP first... It might be just menopause coming on, but at the same time it might not be, you never know. Endometriosis seems to occur in females at any time so it's good to rule it out.