I agree with both posters here that at the 2 week point ovulating can cause some discomfort but its best to have a good checkup with your doctor. Have full blood work done as well because your description of "legs feeling like sandbags", sounds like possible low iron.

My daughter gets very bad cramps the first day of her period and her doctor prescribed Mefenamic Acid also known as the name brand Ponstan. How long have you felt like this? Do consult with a doctor because he/she would know best.