Discomfort and pain from working out is typically best treated with rest and plenty of water.
If the discomfort does not go away after 2-3 days, it could be caused by something else. At that point, it is recommended to visit an evidence-based chiropractor to determine the cause of the pain and the proper treatment.
Here is a list of evidence-based chiropractors around the world. http://www.forwardthinkingchiro.com/member-map-1/#!map
Finding a SOT(R) Method chiropractor would give you more answer since they also have ways to determined if the organ are also reflexing to a structure. This is call a viscero-somatic reflex.
Hope this help,
Dr S aka Dr. Awesome
Pain in the leg could mean many things. You may have strained it, as you stated, due to working out and that would be a dull, achy, and tight feeling in the leg muscles. If there is a sharp pain, tingling, burning, or other high intensity type pain, you may have a nerve pinch or tear of some kind. Muscle strains can be stretched or worked out, but nerve pain or tearing has to be addressed clinically.
Go have a chiropractor check through your lower back and pelvis! Those nerves go into the legs and the muscles that attach in the leg attach at the pelvis also!