I was meant to get my period on Sunday,it is now Thursday. I took an ovulation test on Monday and it came out positive, I took one Tuesday which was a negative, I ve taken one today which has come out positive.I m prone to cysts on my ovaries, I ve had 7 since I was 16 (I m 18). I never miss a period unless I have a cyst, which leaves me bloated and in excruciating pain. I have a slight cramp in my lower stomach and back, I m using the toilet constantly, I ve been really moody, and things I used to do like smoke and eat chicken (Poultry vegetarian) now make me sick, I ve been throwing up, I haven t had any discharge in the past couple of days, my breasts are larger than normal. Could I be pregnant?