What could be wrong............?

Ok so I have have been having symptoms that seem to have no connection to each other. So here they are, I am getting dizzy spells like just getting up I feel dizzy, cramping in my lower stomach I just got off my period like 4 days ago, twinges in my lower stomach kind of on the sides, emotion roller coaster, like I have been crying tonight at tv shows and movies and I can go from happy to mad in a split second, nausea, lower back pain, and pain in my legs. So is there one direction I should look into??