What Causes Shaky Hands And Legs Along With Headache And Dizziness?

Hi, I have my hands and legs shaking a Little bit, specially my legs when i stand or bend over. headache and eye pain, dizziness, and short pain in different place in my body, my right hand my knee my back. I cant lift heavy things with my right hand, my right hand shaking started 2 months ago but since this weekend i have my legs shaking too. its not seen by the others i can just feel it. I also have stomachache and a little bit nausea, mostly in the morning. My eye pain is getting worse. I am a 25 year old, female. I am taking BC and Vitamins everyday.