Symptoms?

recently i have been noticing many possible signs of leukemia. i have rather large bruises on my legs that have not been caused by injury. i have tiny purple marks and red dots on my inner thigh that have been there for a few years. today my whole body hurts. i hurts to walk and get up from a chair and i havent done any hard labor. i had a previous incident where i couldnt even walk. both legs were in so much pain i had to go to the hospital and they told me nothing was wrong after doing an x ray. it went away but i never knew what caused it. i was wondering if this should be a concern because i have been feeling sick on and off for 4 years with nausea and just feeling sick...i dont know if leukemia would develop that slowly. please anyone if you have any more information or advice, it is greatly appreciated! thanks.