burning pain in legs and right arm

i took a bad fall in feburary, they took an xray said nothing was broken and within a week i was back to normal. then about 2 weeks later, i started getting every day pain in my legs, and only my right arm. any time i do something, i hurt for days afterwards. it's like my nerves are over-sensitive. i've had tons of blood tests, all normal. i've had an mri, they said no MS. i had a bone scan, they said all looks normal. i went to a chriopractor, no pinched nerves. i went to one neuoro doc who told me to see a psych doc. i have an appt now with a different neuoro doc. i'm taking tramadol & vicodin (at nite) for the pain. my legs hurt awful, burning pain, sometimes i feel like a gush of water flows down them (inside), sometimes they feel wooden & heavy. it started with my legs, and now only my right arm. the pain gets alot worse when i'm near my period, during the week before it nothing gets rid of the pain. i'm young & otherwise healthy, and this is getting depressing! has anyone ever had anything like this?