PMS or Pregnancy

Hi ladies I need advice. Little bit of TMI sorry in advance. About two weeks before my period my nipples have been very erect and sore (this hasn't happened before as a PMS symptom or anything) it's about 3 days till my period and the soreness have subsided abit. But I've been very tired lately. I wake up and I'm extremely tired. I have to urinate frequently and more than I do normally. I'm very bloated. Can it be early signs or pregnancy or just PMS?