What Causes Sickness In The Morning?

hi my name is melyssa me and my bf are trying for a my second child his first and i just got my period today witch i ussually get on the 26th ive been having hot flashes latley and feel sick in the morning and have had pains in my tummy i dk if im preg or not my period is lighter then normal late and pinkish and if im not preg is there any tips u have for me