Got My Period Late N 3 Days...i Wz Feeling Vomitish

got my period late n 3 days...i wz feeling vomitish & had body aches before i start my.period.als ths time my period wz abnormal.i gt it very less than usual als n da last day it wz so brown.stil i hv vomitish feeling & tiny body aches.do i hv to gt a pregnancy test.my last period first date wz 3rd marcchh