Also something to add, alot of times if you think your pregnant you can trick your body into feeling symptoms that you believe you should feel. Have you missed AF yet? if so how long has it been? If its been at least 5 days to a week you can take a hpt or just get a blood test done at your doctor.
Symptoms are not reliable and don't mean anything. These same symptoms can be from PMS, illness, hormonal change, stress, etc. The only way to know if you are pregnant or not is by taking a pregnancy test, either at home or at your doctor's office.