Yes, that would have been a progesterone cream you were using to prevent miscarriage for the first three months of your pregnancy.

There is evidence that the ups and downs of the female hormonal cycle affect women with MG, but I've read conflicting things about which hormones make it worse. I personally think it's not the hormones themselves, but the shifts.

I get suddenly worse right at the end of each cycle, which is when the progesterone drops. I never had PMS, but my MG symptoms follow a PMS-like pattern. I once stupidly, with the help of a reckless ob/gyn, tried supplementing the progesterone with the idea of easing that drop. Made me really nauseous. I quit. Dropped from a higher level. Ended up in the hospital for a week because it made my MG symptoms so much worse.

The moral of this story is: be really, really careful with the hormones. And journal! Write down what you eat, what you do, what the weather is, what part of your cycle you're in, how you slept. If you can find out what makes you worse (or at least some of the things--most of us have the "for no reason" thing, too), you can avoid some triggers or at least know what to expect.

Abby