I've been diagnosed with fibromyalgia. my core and leg muscles bother me, regardless of how well i feel elsewhere. i don't know what to do. advice?

Stretch and walk: The key: daily stretching and moderate intensity low impact cardiovascular exercise. Gently stretch the sore muscles, remembering to breathe as you stretch. Then perform low-impact cardiovascular exercise, brisk walking, cycling or water exercise, aquatic has most significant effect. Start with an amount that is relatively easy and comfortable, add 2-3 mins, once a week. Goal 45 min per day.

Second Opinion: No slam on your doctor whatsoever, but i always recommend anyone diagnosed w/ fibromyalgia get a second opinion. Even my own patients who I have diagnosed. This is because this is mainly a condition diagnosed by exclusion.