should I take the test?!?!

We have been TTC The last 4 months but this month I've noticed some things... sore nipples, sore breasts, breast seem bigger/fuller, I have never had sore breast before starting my period! Having severe headaches, dizziness, tired all the time, and like certain smells lately. For example my fiancés breath I never seemed to smell/bother me now I cnt stop smelling it. I'm supposed to start period on march 20 and am thinking about taking a pregnancy test today. Should I?