Here are the probabilities of your chances being pregnant with these symptoms from  high to medium to low.

High Pregnancy Probability (Nearly 100% chance of pregnancy)

• No menstrual period (amenorrhea), AND known day of ovulation, AND 17+ DPO
• An elevated BBT curve for 16+ days without a menstrual period
• A positive blood hCG pregnancy test (When?)
• A positive urine pregnancy test (HPT)
• A gestational sac on ultrasound
• Fetus on ultrasound

Medium Pregnancy Probability (About 50% chance of pregnancy with one of these)

• Missed menstrual period (amenorrhea), known day of ovulation, AND 15-16 DPO
• Missed menstrual period AND more than two of the symptoms below
• Triphasic curve, 12+ DPO, AND more than two of the symptoms below

Low Pregnancy Probability (Less than 25% chance of pregnancy)

• Missed menstrual period for over one week (not knowing if ovulation happened) AND a repeatedly negative pregnancy test
• Abundant cervical mucus >10 DPO
• A negative blood hCG test
• Triphasic curve <12 DPO
• Bleeding or spotting about a week after ovulation
• Lower abdominal cramps
• Heavy breasts
• Breasts increasing in size
• Nausea
• Nipple or breast tenderness
• Fatigue
• Vomiting
• Food cravings
• Metallic taste in mouth
• Dry skin
• Thirst
• Frequent urination
• Softening of cervix
• Constipation
• Lower-back pain