on birth control on and off for a year but never consistent.

Hi,
Welcome to ehealthforum,
The symptoms could be attributed to the hormonal content of your birth control pills or even pregnancy. The effective protection from the birth control pills will not be present, and you can be at risk for pregnancy if you have messed up your regular birth control pill intake, or have missed taking 2 or more than 2 active pills, or taken them late by more than 2-3 hours on 2 or more than 2 occasions. Wait and watch for your next periods/withdrawal bleeding. Look out for development of any other new symptoms if pregnancy is suspected. If periods do not start within 10 days of expected period dates, or if you get abnormal periods, or if you suspect chances of pregnancy, consider visiting your doctor/gynecologist at the earliest for thorough examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Take adequate rest. Drink plenty of water. Maintain healthy diet. Stop the use of hormonal contraceptive if pregnancy is suspected, or if pregnancy gets confirmed.
Take care.