Please help me, I had my period on 12/2, then on 12/7 I started seeing…

Please help me, I had my period on 12/2, then on 12/7 I started seeing clear white, stretchy discharge until today, secondly, my nipple started hurting me seriously this Monday, but it has reduced now, right now I'm having a severe headache, and my whole body hurts inside, please could this be signs of pregnancy, and can I go and get a blood test, will it tell now if I am pregnant?