been feeling constipation , frequent urination , fatigue , bloated , headaches , light headed for about 2 month now . little by little these symptoms have start with in that time . spotted 3 times . been feeling like i am going to vomit but nothing comes out i can feel it and nothing i always get my period and i missed it . my breast had gotten small cause i had lost some weight and out of nowhere they are back to their normal size . i gained about 6 pounds these last 2 months which had me thinking since i have been trying to gain weight for the longest but just could gain weight to save my life . also i have beeen getting these back pains the heaches dont last too long but the light headedness for at least an hour . could i be pregnant or whats wrong ?