I'm having cramps, constipation, very sore breasts/hard nipples, hot flashes, and my hunger has increased a lot.. i feel a pulse in my lower stomach??

Without more history: ...and a physical exam I can't answer your implied question. You should see a health care practitioner. It doesn't have to be a gynecologist, A family physician or a physician's assistant can get the information they need and do a complete exam including a pelvic exam. A pregnancy test, along with some other lab work, are also appropriate. Best wishes. Dr. Anne

Period: have you had unprotected sex is so please do a pregnancy test