THE 1ST MONTH OF A NEWBORN; DURING THE FIRST TRIMESTER YOUR BODY UNDERGOES MANY CHANGES. HORMONAL CHANGES AFFECT ALMOST EVERY ORGAN SYSTEM IN YOUR BODY. THESE CHANGES CAN TRIGGER SYMPTOMS EVEN IN THE VERY FIRST WEEKS OF PREGNANCY. YOUR PERIOD STOPPING IS A CLEAR SIGN THAT YOU ARE PREGNANT. OTHER CHANGES MAY INCLUDE: EXTREME TIREDNESS TENDER, SWOLLEN BREASTS. YOUR NIPPLES MIGHT ALSO STICK OUT. UPSET STOMACH WITH OR WITHOUT THROWING UP (MORNING SICKNESS) CRAVINGS OR DISTASTE FOR CERTAIN FOODS MOOD SWINGS CONSTIPATION (TROUBLE HAVING BOWEL MOVEMENTS) NEED TO PASS URINE MORE OFTEN HEADACHE HEARTBURN WEIGHT GAIN OR LOSS