Hi there ~
I would advise you to take a pregnancy
test if you have not had your period and are past due for your next cycle. If it is negative, please repeat the test within one week and find out if you are pregnant. I would not get worried about pregnancy if you have been using the contraceptive
pill, however since you came off of it, I wonder if you were trying to conceive. I would not attribute your gassy and bloated feeling and the headaches
to being symptoms of being pregnant. Please see a doctor to get your doubts cleared.
I hope this helps. Take care and have a lovely day !